Properties of the Number 25730

Twenty-Five Thousand Seven Hundred Thirty

Basics

Value: 25729 → 25730 → 25731

Parity: even

Prime: No

Previous Prime: 25717

Next Prime: 25733

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 × 5 × 31 × 83

Divisors: 1, 2, 5, 10, 31, 62, 83, 155, 166, 310

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110010010000010

Octal: 62202

Duodecimal: 12A82

Hexadecimal: 6482

Square: 662032900

Square Root: 160.40573555830227

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

a(n) = p(n)*p(n+2) - 3·p(n+1), where p(n) is the n-th prime. A152528

a(n) = a(n-2) + a(n-3), with a(0) = 0, a(1) = 1, a(2) = 2. A7307

a(n) = a(n-1) + a(n-2) + a(n-4), with a(1)=1, a(2)=1, a(3)=3, a(4)=6. A259968

Expansion of (1-x-2·x²)/(1-x²+x³). A109248

G.f. satisfies A(x) = exp( ∑_k>=1 (2 * (-1)^k + A(x^k)) * x^k/k ). A363565

Expansion of (1-2x)/(1-x²+x³). A117363

a(n) = 3·a(n-1) - 2·a(n-2) + a(n-3), n > 3. A137584

a(n) = k, index of A165959(k) at record values. A230146

Growth series for group with presentation < S, T : S³ = T³ = (S·T)⁶ = 1 >. A298807

Growth series for group with presentation < S, T : S² = T³ = (S·T)¹² = 1 >. A299253