Properties of the Number 81257

Eighty-One Thousand Two Hundred Fifty-Seven

Basics

Value: 81256 → 81257 → 81258

Parity: odd

Prime: No

Previous Prime: 81239

Next Prime: 81281

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 11 × 83 × 89

Divisors: 1, 11, 83, 89, 913, 979, 7387, 81257

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110101101001

Octal: 236551

Duodecimal: 3B035

Hexadecimal: 13d69

Square: 6602700049

Square Root: 285.05613482259946

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Numbers k such that the determinant of the Vandermonde matrix of their digits is equal to σ(k), the sum of divisors of k. A307586

Squarefree terms of A129802 whose prime factors are neither elite (A102742) nor anti-elite (A128852), where A129802 is the possible bases for Pepin's primality test for Fermat numbers. A372895

a(n) is the greatest prime factor of (n³ - 1). A81257