Properties of the Number 25405

Twenty-Five Thousand Four Hundred Five

Basics

Value: 25404 → 25405 → 25406

Parity: odd

Prime: No

Previous Prime: 25391

Next Prime: 25409

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 5 × 5081

Divisors: 1, 5, 5081, 25405

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110001100111101

Octal: 61475

Duodecimal: 12851

Hexadecimal: 633d

Square: 645414025

Square Root: 159.38946012832844

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

T(n,k)=Number of (n+1)X(k+1) 0..4 arrays with every 2X2 subblock summing to 8. A183652

Irregular table read by rows: T(n, k) is the coefficient of x^k in the chromatic polynomial of the 1-skeleton of the n-dimensional cross polytope, 0 <= k <= 2n. A334279

The sequence T_3,1(n,3). A372076

Becomes prime or 4 after exactly 9 iterations of f(x) = sum of prime factors of x. A48131

Number of (n+1) X 2 0..4 arrays with every 2 X 2 subblock summing to 8. A183644

Number of (n+1) X 6 0..4 arrays with every 2 X 2 subblock summing to 8. A183648

Triangle of up-down sums of k-th powers: a(n,k)=sum(i^k,i=1..n)+sum((n-i)^k,i=1..n-1), n,k>0. A51672

Number of transitive relations on an n-set with at most three ordered pairs. A393295

Numbers that are the sum of 4 positive cubes in exactly 3 ways. A25405

Number of n-colorings of the vertices of the 6-dimensional cross polytope such that no two adjacent vertices have the same color. A342074