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Properties of the Number 25980

Twenty-Five Thousand Nine Hundred Eighty

Basics

Value: 25979 → 25980 → 25981

Parity: even

Prime: No

Previous Prime: 25969

Next Prime: 25981

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 2 × 3 × 5 × 433

Divisors: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110010101111100

Octal: 62574

Duodecimal: 13050

Hexadecimal: 657c

Square: 674960400

Square Root: 161.1831256676703

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 k such that there is 1 prime between 100·k and 100·k + 99. A186393
Square array T(n,k) = number of plane partitions of n with parts colored in (at most) k colors; n >= 0, k >= 0; read by antidiagonals. A306100
Numbers n = concat(a,b) such that φ(n) = φ(a) * φ(b), where φ = A000010. A147619
Square array T(n,k) = number of plane partitions of n with parts colored in (at most) k colors; n, k >= 1; read by antidiagonals. A306101
Coefficients of numerator of recursively defined rational function: p(x,3)=x*(x2 + 6·x + 1)/(1 - x)4; p(x, n) = 2·x*D[p(x, n - 1), x] - p(x,n-2). A166349
Triangle read by rows: Take a hexagram with all diagonals drawn, as in A331908. Then T(n,k) = number of k-sided polygons in that figure for k = 3, 4, ..., n+5. A331909
Number of plane partitions of n where parts are colored in (at most) 5 colors. A306095
a(n) = 1000·n - 20. A157515
Number of 0..n arrays x(0..4) of 5 elements with nondecreasing average value. A200765
Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where column k is the expansion of B(x)k, where B(x) is the g.f. of A384975. A384978