Happy number
id:
happy-number-246-1307746
title:
Happy number
text:
In number theory, a happy number is a number which eventually reaches 1 when replaced by the sum of the square of each digit. For instance, 13 is a happy number because 1 2 + 3 2 = 10 , and 1 2 + 0 2 = 1 . On the other hand, 4 is not a happy number because the sequence starting with 4 2 = 16 and 1 2 + 6 2 = 37 eventually reaches 2 2 + 0 2 = 4 , the number that started the sequence, and so the process continues in an infinite cycle without ever reaching 1. A number which is not happy is called sa
brand slug:
wiki
category slug:
encyclopedia
description:
Numbers with a certain property involving recursive summation
original url:
https://en.wikipedia.org/wiki/Happy_number
date created:
date modified:
2024-04-03T08:17:27Z
main entity:
{"identifier":"Q44535","url":"https://www.wikidata.org/entity/Q44535"}
image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/8/84/DessinArbreHeureux01.png","width":774,"height":736}
fields total:
13
integrity:
15