What numbers are not happy?

The numbers for which the process of summing up of the squares of its digits ends in 1 are happy numbers. On the other hand, numbers that don't end in 1 are called unhappy or sad numbers.

What are unhappy numbers?

An unhappy number is a number that is not happy, i.e., a number such that iterating this sum-of-squared-digits map starting with. never reaches the number 1. The first few unhappy numbers are 2, 3, 4, 5, 6, 8, 9, 11, 12, 14, 15, 16, 17, 18, 20, ...

Is 13 a sad number?

The first few happy numbers are 1, 7, 10, 13, 19, 23, 28, 31, 32, 44, 49, 68, 70, 79, 82, 86, 91, 94, 97, 100, ...

How do you know if a number is not happy?

To find whether a given number is happy or not, calculate the square of each digit present in number and add it to a variable sum. If resulting sum is equal to 1 then, given number is a happy number. If the sum is equal to 4 then, the number is an unhappy number.

Is 145 a happy number?

10-happy numbers

4 → 16 → 37 → 58 → 89 → 145 → 42 → 20 → 4 → ... , all numbers either lead to 1 and are happy, or lead to the cycle and are unhappy.

145 and the Melancoil - Numberphile

What's a pretty number?

The number 1.618… goes by many different names. However, mathematicians mostly call it phi. Everywhere around us, we see this beautiful number. It isn't the number itself that is special, but rather all the other beautiful objects that revolve around it.

What is beautiful number?

A number is called beautiful if, for every digit x in the number, there are x occurrences of it in the number. Example: 1 is beautiful because 1 has 1 occurrence. 3133 is beautiful because 1 has 1 occurrence and 3 has 3 occurrences.

What makes a number evil?

In number theory, an evil number is a non-negative integer that has an even number of 1s in its binary expansion. These numbers give the positions of the zero values in the Thue–Morse sequence, and for this reason they have also been called the Thue–Morse set.

What is the least liked number?

More than any other number, people seemed to pick 0 because they thought it was a clever thing to do, Bellos says. As for the world's “least favorite” number, that would be 110.

Is 2022 a happy number?

The happy numbers up to 10000 are 1, 10, 100, 222, 488, 848, 884, 1000, 1113, 1131, 1311, 2022, 2202, 2220, 226X, 22X6, 262X, 26X2, 2X26, 2X62, 3111, 4088, 4808, 4880, 622X, 62X2, 6666, 66EE, 6X22, 6E6E, 6EE6, 8048, 8084, 8408, 8480, 8804, 8840, X226, X262, X622, E66E, E6E6, EE66, 10000.

Is 5555 a happy number?

You can find a lot of 'happy numbers' such as: 310, 70, 86, 130, 7, 5555, 1212, 13, 1000 and other numbers which are variations of these, e.g. swapping the numbers the other way around (13, 31) and adding zeros onto the end of numbers (31, 310).

What's special about 37?

37 is the first irregular prime, and the third isolated prime without a twin prime. It is also the third cuban prime, the fourth emirp, and the fifth lucky prime. 37 is the third star number and the fourth centered hexagonal number. The sum of the squares of the first 37 primes is divisible by 37.

Which is the saddest number?

In the world of everyday reality, three is a highly unstable number. We might even say that it is the loneliest number of all. Think about it.

Is there an evil number?

sum to 666 is known as an evil number (Pegg and Lomont 2004). However, the term "evil" is also used to denote nonnegative integers that have an even number of 1s in their binary expansions, the first few of which are 0, 3, 5, 6, 9, 10, 12, 15, 17, 18, 20, ...

Is the number 9 sad?

number symbolism

In contrast to 8, the number 9 often represents pain or sadness.

What number is loneliness?

To get a 43, you could say “sometimes” for 3 questions and “rarely” for the other 17 (3*3 + 17*2). Seems to me that you could be considered as “rarely feeling lonely,” but as Cigna spins it you'd be “lonely”.

Why is 4 Unhappy number?

But the number four is considered unlucky because it sounds a lot like the word for “death,” and as a result Chinese buildings often lack a fourth floor (just as American buildings sometimes skip the 13th). Likewise, Chinese drivers avoid license plates ending in four.

What is the most loved number?

But if you ask enough people, you start to see which numbers emerge as consensus favorites across the population. Math blogger Alex Bellos recently did this, and after polling more than 44,000 people from around the world on his website, he got an answer: The world's favorite number is 7.

What is number 666 meaning?

Number of the beast

In modern popular culture, 666 has become one of the most widely recognized symbols for the Antichrist or, alternatively, the devil. Earnest references to the number occur both among apocalypticist Christian groups and in explicitly anti-Christian subcultures.

What is the God number?

The term "God's number" is sometimes given to the graph diameter of Rubik's graph, which is the minimum number of turns required to solve a Rubik's cube from an arbitrary starting position (i.e., in the worst case). Rokicki et al. (2010) showed that this number equals 20.

Why 9 is unlucky?

9: Just as the number four has a bad-luck soundalike in Chinese, 9 is feared in Japan because it sounds similar to the Japanese word for torture or suffering.

Which number is very special?

The number 1

One is the only number by which all other numbers divide into integers. It's the only number divisible by exactly one positive integer (itself, 1). It's the only positive integer that's neither prime nor composite.

What is the most magic number?

Those three digits, as it turns out, have long been the rare object of fascination that bridges the gulf between science and mysticism. "137 continues to fire the imagination of everyone from scientists and mystics to occultists and people from the far-flung edges of society," Arthur I.

What is a humble number?

A number whose only prime factors are 2,3,5 or 7 is called a humble number. The sequence 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 25, 27, ... shows the first 20 humble numbers. Write a program to find and print the nth element in this sequence.