Properties of the Number 25991

Twenty-Five Thousand Nine Hundred Ninety-One

Basics

Value: 25990 → 25991 → 25992

Parity: odd

Prime: No

Previous Prime: 25981

Next Prime: 25997

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 7 × 47 × 79

Divisors: 1, 7, 47, 79, 329, 553, 3713, 25991

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110010110000111

Octal: 62607

Duodecimal: 1305B

Hexadecimal: 6587

Square: 675532081

Square Root: 161.21724473517094

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

Centered cube numbers: n³ + (n+1)³. A5898

Number of compositions of n with weakly increasing first quotients. A342492

Number of Fermat pseudoprimes to bases 2, 3 and 5 less than 10ⁿ. A114248

(Product of twin primes - 1)/2. A120876

a(n) = 18·n² - 1. A157910

Number of partitions of 5n such that cn(1,5) = cn(4,5) = cn(2,5) = cn(3,5) <= cn(0,5). A202085

Numbers n such that n through n+5 have the same number of distinct prime factors. A45934

a(n) is the number of edges formed by n-secting the angles of a heptagon. A335759

Sum of the legs of the unique primitive Pythagorean triple whose inradius is the n-th prime and whose short leg is an odd number. A382097

a(n) = 72·n² - 1. A158738