Properties of the Number 25279

Twenty-Five Thousand Two Hundred Seventy-Nine

Basics

Value: 25278 → 25279 → 25280

Parity: odd

Prime: No

Previous Prime: 25261

Next Prime: 25301

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 17 × 1487

Divisors: 1, 17, 1487, 25279

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 110001010111111

Octal: 61277

Duodecimal: 12767

Hexadecimal: 62bf

Square: 639027841

Square Root: 158.99371056743092

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(1) = 1; set of digits of a(n)² is a subset of the set of digits of a(n+1)². A66825

E.g.f.: exp( ∑_n>=1 x^n*(n+1/2) / (n*(n+1)/2)! ). A205799

Denominators of continued fraction convergents to sqrt(711). A42369

a(n) = ∑_k=1..n sigma₂(k) * floor(n/k). A356042

47-gonal numbers. A95311

Numbers n such that the decimal representation of the Elias δ code of n is a palindromic prime. A281496

Numbers k such that prime(k+1)^prime(k+3) == prime(k) mod prime(k+2). A335571

a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ...+ a(n-1)*a(1) for n >= 5, starting 1,0,-1,1. A25279