Properties of the Number 25815

Twenty-Five Thousand Eight Hundred Fifteen

Basics

Value: 25814 → 25815 → 25816

Parity: odd

Prime: No

Previous Prime: 25801

Next Prime: 25819

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 1721

Divisors: 1, 3, 5, 15, 1721, 5163, 8605, 25815

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110010011010111

Octal: 62327

Duodecimal: 12B33

Hexadecimal: 64d7

Square: 666414225

Square Root: 160.67047021777213

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

EULER transform of 3, 2, 2, 2, 2, 2, 2, 2, ... A713

Number of integer partitions of n whose nonzero first differences are a submultiset of the parts. A364675

Integers k such that nextprime(k⁵) - prevprime(k⁵) = 4. A90123

Numbers k such that the k-th triangular number contains only digits {0,2,3}. A119050

Number of integers in n-th generation of tree T(-3/4) defined in Comments. A274151

Least number k such that k mod s = prime(n) where s is the sum of the distinct primes dividing k. A262965

Expansion of 1/((1-x²)*(1-x⁶)*(1-x¹¹)). A25815

Number of nX4 0..1 arrays with every element equal to 0, 1, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero. A299447

G.f. A(x) satisfies [xⁿ] A(x)ⁿ = [xⁿ] -1/A(x)ⁿ⁺¹ for n > 1 with A(0) = 1, A'(0) = 1. A383556