kierroslukujen
Kierroslukujen, often translated as "rotational numbers" or "cyclic numbers" in English, is a concept in number theory that refers to numbers whose multiples are cyclic permutations of each other. A number is a kierrosluku if its multiples, when written out, show the same digits in the same order but shifted cyclically.
The most famous example of a kierrosluku is the number 142857. When multiplied by 1, it is
Kierroslukuja are closely related to repeating decimals. Specifically, a number $n$ is a kierrosluku if and
The general form of kierroslukuja can be derived from prime numbers $p$ such that $10$ is a
The concept of kierroslukuja has applications in recreational mathematics and in understanding the properties of decimal
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