Properties of the Number 25605

Twenty-Five Thousand Six Hundred Five

Basics

Value: 25604 → 25605 → 25606

Parity: odd

Prime: No

Previous Prime: 25603

Next Prime: 25609

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 5 × 569

Divisors: 1, 3, 5, 9, 15, 45, 569, 1707, 2845, 5121

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110010000000101

Octal: 62005

Duodecimal: 12999

Hexadecimal: 6405

Square: 655616025

Square Root: 160.01562423713506

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 k such that the least term in the periodic part of the continued fraction for sqrt(k) is 64. A31742

The number of distinct positions on an infinite chessboard reachable by the (2,3)-leaper (or zebra) in at most n moves. A297740

Position where n (presumably) appears the last time in A107261, or 0 if n keeps appearing. A107262

a(n) = 25·n² + 5. A158445

G.f. A(x) satisfies: 0 = ∑_n=-oo..+oo x^n² * (xⁿ - (-1)ⁿ*A(x))ⁿ⁺¹. A355152

Number of walks within N² (the first quadrant of Z²) starting at (0,0), ending on the vertical axis and consisting of n steps taken from {(-1, 0), (-1, 1), (0, 1), (1, -1), (1, 0)}. A151451

Number of n-move queen paths on 8x8 board from given corner to opposite corner. A25605