Properties of the Number 25691

Twenty-Five Thousand Six Hundred Ninety-One

Basics

Value: 25690 → 25691 → 25692

Parity: odd

Prime: No

Previous Prime: 25679

Next Prime: 25693

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 23 × 1117

Divisors: 1, 23, 1117, 25691

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 110010001011011

Octal: 62133

Duodecimal: 12A4B

Hexadecimal: 645b

Square: 660027481

Square Root: 160.28412273210344

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

Triangle read by rows: T(n,k) is the number of length n words over an n-ary alphabet such that the maximal cardinality of C is k, where C is a subset of the alphabet such that all letters in C appear in weakly increasing order within the word. A387336

Least k such that the first k terms of A006928 contain n more 2's than 1's. A25507

Indices in A006928 where the imbalance between 1's and 2's sets a new record. A274775

Numbers n such that 3·2^n-1 - 1 is prime. A91997

Exponent of 10 (value of j) in n-th number of form 9ⁱ*10^j. A25691