Properties of the Number 25185

Twenty-Five Thousand One Hundred Eighty-Five

Basics

Value: 25184 → 25185 → 25186

Parity: odd

Prime: No

Previous Prime: 25183

Next Prime: 25189

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 23 × 73

Divisors: 1, 3, 5, 15, 23, 69, 73, 115, 219, 345

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110001001100001

Octal: 61141

Duodecimal: 126A9

Hexadecimal: 6261

Square: 634284225

Square Root: 158.6978260720669

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

Expansion of ∏_k>=1 (1 + x^3·k-1)^3·k-1 * (1 + x^3·k-2)^3·k-2. A262924

Fundamental discriminants d uniquely characterizing all complex biquadratic fields Q(sqrt(-3),sqrt(d)) which have 3-class group of type (3,3) and second 3-class group isomorphic to SmallGroup(729,34). A250241

Numbers n such that Maple 9.5, Maple 10, Maple 11 and Maple 12 give the wrong answers for the number of partitions of n. A110375

Numbers k such that rotating digits of k² left once still yields a square. A45878

G.f.: [∑_n>=0 x^n*(n+1/2) * (1+x)ⁿ ]³. A182152

a(n) is the least k such that the continued fraction for sqrt(k) has periodic part [r, 1, 2, ..., n-1, n, n-1, ..., 1, 2r] for some positive integer r. A351139

Products k of 4 distinct primes (or tetraprimes) such that k has no squarefree neighbors. A364141

Equal count of primes congruent to 1 mod 4 and 3 mod 4 associated with primes in A007351 (the zero beginning the sequence indicates the prime 2). A92198

a(n) = number of primes that are the initial prime of a twin prime pair that are > (10ⁿ)*(10ⁿ+1) and < (10ⁿ)*(10ⁿ+1)+2*(10ⁿ)+2. A135433

a(n) = T(3n,n), where T is the array defined in A025177. A25185