Properties of the Number 25981

Twenty-Five Thousand Nine Hundred Eighty-One

Basics

Value: 25980 → 25981 → 25982

Parity: odd

Prime: Yes

Previous Prime: 25969

Next Prime: 25997

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 25981

Divisors: 1, 25981

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110010101111101

Octal: 62575

Duodecimal: 13051

Hexadecimal: 657d

Square: 675012361

Square Root: 161.1862276995153

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 polyominoes of n cells with both horizontal and vertical symmetries, for which the 180-degree rotational symmetry has an axis that coincides with the center of a square, but without 90-degree rotational symmetry. A351190

Consecutive states of the linear congruential pseudo-random number generator for 16-bit WATFOR/WATFIV when started at 1. A384158

Primes base 10 that remain primes in six bases b, 2<=b<=10, expansions interpreted as decimal numbers. A52028

Number of ON states after n generations of cellular automaton based on f.c.c. lattice with each cell adjacent to its twelve neighbors. A151776

a(n) = 836·2ⁿ - 771. A305264

Number of (w,x,y) with all terms in {0,...,n} and |w-x| + |x-y| ≠ w+x+y. A213480

Numbers k such that the continued fraction for sqrt(k) has period 79. A20418

Primes p such that the sum of the digits of p is not prime, but the sum of each digit raised to the 4th power is prime. A91368

Primes p such that (p+18), (p+36) and (p+72) are also prime. A175158

Number of arrangements of 4 numbers x(i) in -n..n with the sum of x(i)*x(i+1) equal to zero. A188359