262_(number)

262 (number)

262 (number)

Natural number

262 (two hundred [and] sixty-two) is a natural number preceded by the number 261 and followed by 263. It has the prime factorization 2·131.

Quick Facts ← 261 262 263 →, Cardinal ...

Mathematical properties

There are four divisors of this number, the divisors being 1, 2, 131, and 262 itself, which makes it a semiprime.

It is the sixth meandric number,[1] and the ninth open meandric number.[2]

As it cannot be divided into the sum of the proper divisors of any number, it is the 17th untouchable number.[3]

As it eventually reaches 1 when replaced by the sum of the square of each digit, it is the 40th 10-happy number.[4]

As 262 is 262 backwards, it is a palindromic number.[5]

References

  1. [1]
    Sloane, N. J. A. (ed.). "Sequence A005315 (Closed meandric numbers (or meanders): number of ways a loop can cross a road 2n times)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  2. [2]
    Sloane, N. J. A. (ed.). "Sequence A005316 (Meandric numbers: number of ways a river can cross a road n times)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  3. [3]
    Sloane, N. J. A. (ed.). "Sequence A005114 (Untouchable numbers, also called nonaliquot numbers: impossible values for the sum of aliquot parts function)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  4. [4]
    Sloane, N. J. A. (ed.). "Sequence A007770 (Happy numbers: numbers whose trajectory under iteration of sum of squares of digits map includes 1)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  5. [5]
    Sloane, N. J. A. (ed.). "Sequence A002113 (Palindromes in base 10)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
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