Properties of the Number 56725

Fifty-Six Thousand Seven Hundred Twenty-Five

Basics

Value: 56724 → 56725 → 56726

Parity: odd

Prime: No

Previous Prime: 56713

Next Prime: 56731

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 5 ² × 2269

Divisors: 1, 5, 25, 2269, 11345, 56725

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1101110110010101

Octal: 156625

Duodecimal: 289B1

Hexadecimal: dd95

Square: 3217725625

Square Root: 238.17010727629108

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

a(1) = a(2) = 1. a(n) = a(n-1) + (largest nonprime {1 or composite} among the first n-2 terms of the sequence). A120760

a(1)=1, a(2)=4, and thereafter a(n) = a(n-2) + k·a(n-1), with minimal k >= 1 such that a(n) is not prime. A374055

Numbers k such that 9·10^k - 1 is prime. A56725