Properties of the Number 25585

Twenty-Five Thousand Five Hundred Eighty-Five

Basics

Value: 25584 → 25585 → 25586

Parity: odd

Prime: No

Previous Prime: 25583

Next Prime: 25589

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 5 × 7 × 17 × 43

Divisors: 1, 5, 7, 17, 35, 43, 85, 119, 215, 301

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 110001111110001

Octal: 61761

Duodecimal: 12981

Hexadecimal: 63f1

Square: 654592225

Square Root: 159.95311813153253

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

Square pyramidal numbers: a(n) = 0² + 1² + 2² + ... + n² = n*(n+1)*(2·n+1)/6. A330

a(n) = ∑_{k=1..n, gcd(n,k) = 1} k². A53818

Triangle of Gaussian (or q-binomial) coefficients for q = -2. A15109

Sum of next n squares. A72474

d(n,s) = number of perfect matchings on {1, 2, ..., n} with s short pairs. A79267

7 times hexagonal numbers: a(n) = 7·n*(2·n-1). A195320

T(n,k)=Number of nXk 0..2 arrays with no element equal to any value at offset (-1,-2) (0,-1) or (-1,0) and new values introduced in order 0..2. A274749

Sum of the squared parts of the partitions of n into exactly two parts. A226141

Sum of the squares of the parts in the partitions of n into two distinct parts. A294286

Numbers that are sums of 2 or more consecutive squares in more than 1 way. A62681