Properties of the Number 25639

Twenty-Five Thousand Six Hundred Thirty-Nine

Basics

Value: 25638 → 25639 → 25640

Parity: odd

Prime: Yes

Previous Prime: 25633

Next Prime: 25643

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 25639

Divisors: 1, 25639

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110010000100111

Octal: 62047

Duodecimal: 12A07

Hexadecimal: 6427

Square: 657358321

Square Root: 160.1218286180869

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

Number of partitions of n in which the number of parts divides n. A67538

Base-8 Armstrong or narcissistic numbers (written in base 10). A10354

Balanced primes of order six. A96698

Base 8 perfect digital invariants (written in base 10): numbers equal to the sum of the k-th powers of their base-8 digits, for some k. A162231

Greatest integer equal to the sum of the n-th powers of its base-8 digits (written in base 10). A162233

Primes p == 3 (mod 4) such that the multiplicative order of 2+-i modulo p in Gaussian integers (A385165) is not divisible by 2 or 3. A385188

a(n) = ∑_k=1..n floor(n/k)^k. A345176

P(n,k) is an array read by rows, with n > 0 and k=1..5, where row n gives the chain of 5 consecutive primes {p(i), p(i+1), p(i+2), p(i+3), p(i+4)} having the symmetrical property p(i) + p(i+4) = p(i+1) + p(i+3) = 2·p(i+2) for some index i. A267028

Prime sums of 4 positive 5th powers. A123033

List of Armstrong (narcissistic) numbers in base 8 that are prime (written in base 10). A180015