Properties of the Number 25478

Twenty-Five Thousand Four Hundred Seventy-Eight

Basics

Value: 25477 → 25478 → 25479

Parity: even

Prime: No

Previous Prime: 25471

Next Prime: 25523

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 × 12739

Divisors: 1, 2, 12739, 25478

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110001110000110

Octal: 61606

Duodecimal: 128B2

Hexadecimal: 6386

Square: 649128484

Square Root: 159.6182946908029

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

Positions of records in A249431. A249432

3-comma numbers: n occurs in the sequence S[k+1]=S[k]+10·last_digit(S[k-1])+first_digit(S[k]) for three different splittings n=concat(S[0],S[1]). A166513

a(n) = 2^2n-1 - (n+2)*3^n-2. A125586

Number of -1..1 arrays x(0..n+1) of n+2 elements with zero sum and no two neighbors summing to zero. A199825

Number of partitions of n into parts not of the form 17k, 17k+7 or 17k-7. Also number of partitions with at most 6 parts of size 1 and differences between parts at distance 7 are greater than 1. A35968

Numbers k such that 11·7^k + 2 is prime. A83724

Least roots of perfect powers (A001597). A25478

Lexicographically earliest sequence of distinct positive terms such that a(1) = 1, a(2) = 2, and for any n > 2, the greatest prime factor of a(n) does not exceed the prime next to the greatest prime factor of a(n-1). A320454