Properties of the Number 25381

Twenty-Five Thousand Three Hundred Eighty-One

Basics

Value: 25380 → 25381 → 25382

Parity: odd

Prime: No

Previous Prime: 25373

Next Prime: 25391

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 17 × 1493

Divisors: 1, 17, 1493, 25381

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110001100100101

Octal: 61445

Duodecimal: 12831

Hexadecimal: 6325

Square: 644195161

Square Root: 159.31415505221122

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

Number of n-node triangulations of the sphere with minimal degree 5. A81621

a(n) = (n³ + 3·n - 2)/2. A132127

Numerator of h(n+5) - h(n) where h(n) = ∑_k=1..n (1/k) are the Harmonic numbers. A189998

Number of (n+2) X 6 0..2 arrays with every 3 X 3 subblock commuting with each horizontal and vertical neighbor 3 X 3 subblock. A186563

Number of (n+2) X 4 0..3 arrays with every 3 X 3 subblock commuting with each horizontal and vertical neighbor 3 X 3 subblock. A186874

Number of (n+2) X 10 0..3 arrays with every 3 X 3 subblock commuting with each horizontal and vertical neighbor 3 X 3 subblock. A186880

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 499", based on the 5-celled von Neumann neighborhood. A272562

a(n) is the index of the Stieltjes constant at the beginning of the first set of exactly n successive constants of the same sign. A354878

a(n) = 4·n³ - 6·n² + 6·n - 2 + (-1)ⁿ. A382973

a(n) = 32·n³ - 72·n² + 60·n - 19. A393192