Properties of the Number 25921

Twenty-Five Thousand Nine Hundred Twenty-One

Basics

Value: 25920 → 25921 → 25922

Parity: odd

Prime: No

Previous Prime: 25919

Next Prime: 25931

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 7 ² × 23 ²

Divisors: 1, 7, 23, 49, 161, 529, 1127, 3703, 25921

Polygonal

Triangular: No

Square: Yes

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 110010101000001

Octal: 62501

Duodecimal: 13001

Hexadecimal: 6541

Square: 671898241

Square Root: 161

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

Number of integer partitions of n whose product of parts is >= n. A319005

a(n) = (4·n + 1)². A16814

a(n) and floor(a(n)/5) are both squares; i.e., squares which remain squares when written in base 5 and last digit is removed. A55812

Sum of legs of primitive Pythagorean triangles having legs that add up to a square, sorted on hypotenuse. A89552

Number of ways to choose a partition, with odd parts, of each part of a partition of n into odd parts. A300301

Number of 3·n binary matrices without unit columns up to row and column permutations. A57524

a(n) = (5·n + 1)². A16862

a(n) = (6·n + 5)². A16970

Numbers which converge to 2592 under repeated application of the powertrain map of A133500. A135384

a(n) = (10·n + 1)². A17282