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Properties of the Number 25420

Twenty-Five Thousand Four Hundred Twenty

Basics

Value: 25419 → 25420 → 25421

Parity: even

Prime: No

Previous Prime: 25411

Next Prime: 25423

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 2 × 5 × 31 × 41

Divisors: 1, 2, 4, 5, 10, 20, 31, 41, 62, 82

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 110001101001100

Octal: 61514

Duodecimal: 12864

Hexadecimal: 634c

Square: 646176400

Square Root: 159.43650773897426

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

Numbers n such that p(n),p(n)+6,p(n)+12,p(n)+18 are consecutive primes and p(n)=6·k+1 for some k, where p(n) denotes n-th prime. A90838
Number of lines through exactly 3 points of an n X n grid of points. A18810
a(n) = (11·n+1)*(11·n+10). A1536
Row sums of triangle A144881 (S1hat(3)) and of array A144880 (M31hat(3)). A144882
Self-convolution of n-th antidiagonal of the natural number array (so named in the Comments section of A000027). A387429
a(1) = 1; a(2) = 2; thereafter a(n) is the smallest number > a(n-1) which is neither of the form 2·a(i) nor ∑j=1..n-1 ( bj*a(j) ) where 0 < i < n, bj = 1 or 0. A331809
a(n) = [ (3rd elementary symmetric function of S(n))/(first elementary symmetric function of S(n)) ], where S(n) = {first n+2 positive integers congruent to 2 mod 3}. A24399
Sum of the odd parts in the partitions of n into 5 parts. A309545
Least sum of 4 positive cubes in exactly n ways. A25420