Properties of the Number 25206

Twenty-Five Thousand Two Hundred Six

Basics

Value: 25205 → 25206 → 25207

Parity: even

Prime: No

Previous Prime: 25189

Next Prime: 25219

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 4201

Divisors: 1, 2, 3, 6, 4201, 8402, 12603, 25206

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110001001110110

Octal: 61166

Duodecimal: 12706

Hexadecimal: 6276

Square: 635342436

Square Root: 158.76397576276554

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

T(n,k)=Number of length n+4 0..k arrays with no five consecutive terms having the maximum of any two terms equal to the minimum of the remaining three terms. A249844

a(n) is the number of edges formed by n-secting the angles of a hexagon. A335735

Number of length n+4 0..4 arrays with no five consecutive terms having the maximum of any two terms equal to the minimum of the remaining three terms. A249840

Number of length 3+4 0..n arrays with no five consecutive terms having the maximum of any two terms equal to the minimum of the remaining three terms. A249847

Expansion of g.f. A(x) satisfying ∑_n=-oo..+oo (xⁿ + A(x))ⁿ = 1 + 3*∑_n>=1 x^n². A370032

Expansion of (1-x)^-1/(1+2·x-x²+2·x³). A77923

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

Number of nonisomorphic vertex-transitive tournaments of order 2n-1. A346179

Series reversion of x + 2·x² + x⁴. A217362

[ Sum{(log(j)-log(i))²} ], 2 <= i < j <= n. A25206