Properties of the Number 25540

Twenty-Five Thousand Five Hundred Forty

Basics

Value: 25539 → 25540 → 25541

Parity: even

Prime: No

Previous Prime: 25537

Next Prime: 25541

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ² × 5 × 1277

Divisors: 1, 2, 4, 5, 10, 20, 1277, 2554, 5108, 6385

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110001111000100

Octal: 61704

Duodecimal: 12944

Hexadecimal: 63c4

Square: 652291600

Square Root: 159.81239000778382

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

Numbers n such that there is no square n-gonal number greater than 1. A188896

The number of regions inside a pentagram formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts. A331906

Let r, s, t, u be four permutations of the set { 1, 2, 3, ..., n }; a(n) = minimal value of ∑_i=1..n r(i)*s(i)*t(i)*u(i). A70736

Number of (n,4) Freiman-Wyner sequences. A97926

Smallest numbers leading in n steps to a term that repeats itself, according to the rule explained in A316650 (and hereunder in the Comment section). A316678

Least common multiple of {C(0,0), C(2,1), ..., C(2n,n)}. A25540

Number of spanning trees in G X P_n, where G = {{1, 2}, {1, 3}, {1, 4}, {2, 5}, {3, 5}}. A167071