Properties of the Number 25990

Twenty-Five Thousand Nine Hundred Ninety

Basics

Value: 25989 → 25990 → 25991

Parity: even

Prime: No

Previous Prime: 25981

Next Prime: 25997

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 × 5 × 23 × 113

Divisors: 1, 2, 5, 10, 23, 46, 113, 115, 226, 230

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110010110000110

Octal: 62606

Duodecimal: 1305A

Hexadecimal: 6586

Square: 675480100

Square Root: 161.21414330014596

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 integer partitions of n whose parts are not in arithmetic progression. A389811

Numbers n such that 1 - Sum{k=1..n/2} A001223(2k-1)*(-1)^k = 0. A130643

Denominators of continued fraction convergents to sqrt(812). A42567

a(n) = ∑_k=1..n floor(n/(2·k-1))^k. A350147

Numbers n such that 1 + S(n) = 0, where S(n) = (S(n-1) + A000040(n))*(-1)ⁿ; S(0)=0, n=>1. A131196

The even composites c such that c=q·g*j·y and q+g=j·y where q,g,j,y are primes. A167690

Numbers·such that σ(x)=σ(V(x)), where σ(x) is the sum of the divisors of·and V(x) the transform defined in A245252. A245469

Convolution of A039599 with itself . A152038

Square array, read by antidiagonals, where row n+1 is generated from row n by first removing terms at positions [(m+3)²/4 - 2] for m>=0 and then taking partial sums, starting with all 1's in row 0. A135878

Square array read by antidiagonals in which T(n,k) is the n-th even number j with the property that the symmetric representation of σ(j) has k parts. A320537