Properties of the Number 25556

Twenty-Five Thousand Five Hundred Fifty-Six

Basics

Value: 25555 → 25556 → 25557

Parity: even

Prime: No

Previous Prime: 25541

Next Prime: 25561

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 6389

Divisors: 1, 2, 4, 6389, 12778, 25556

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110001111010100

Octal: 61724

Duodecimal: 12958

Hexadecimal: 63d4

Square: 653109136

Square Root: 159.86244086714052

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 numbers up to 10ⁿ which are products of three primes. A109251

T(n,k)=Number of nXk 0..1 arrays with no element less than a strict majority of its horizontal, diagonal and antidiagonal neighbors. A231523

Table read by downward antidiagonals: T(n,k) is the number of tilings of the n X k torus up to horizontal and vertical reflections by a tile that is fixed under horizontal reflections but not vertical reflections. A368302

Records in A068189 (smallest number k such that n = product of nonzero digits of k, or 0 if no such k exists). A96867

a(0) = 0, a(1) = a(2) = 1, a(3) = 2, a(4) = 4, for n>3: a(n+1) = SORT[ a(n) + a(n-1) + a(n-2) + a(n-3) + a(n-4)], where SORT places digits in ascending order and deletes 0's. A108565

Triangle read by rows: T(k,n) is number of numbers <= 10ⁿ that are products of k primes. A126280

Integers n where n³ + (n+1)³ is a Taxicab number A001235. A259836

Number of integers in n-th generation of tree T(3/4) defined in Comments. A274146

a(n)= ∑_{j=0..floor(n/2)} A073145(2·j + q), where q = 2*(n/2 - floor(n/2)). A74585

Convolution of A073145 with A056594. A75419