Properties of the Number 20256

Twenty Thousand Two Hundred Fifty-Six

Basics

Value: 20255 → 20256 → 20257

Parity: even

Prime: No

Previous Prime: 20249

Next Prime: 20261

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 ⁵ × 3 × 211

Divisors: 1, 2, 3, 4, 6, 8, 12, 16, 24, 32

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100111100100000

Octal: 47440

Duodecimal: B880

Hexadecimal: 4f20

Square: 410305536

Square Root: 142.32357499725757

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

Square array A(n,k) read by antidiagonals: row n gives coordination sequence for lattice C_n. A103884

Coordination sequence for 6-dimensional cubic lattice. A8414

a(n) = floor(sqrt(n⁷)). A155014

Triangle by rows T(n,k), showing the number of meanders with length 5(n+1) and containing 5(k+1) L's and 5(n-k) R's, where L's and R's denote arcs of equal length and a central angle of 72 degrees which are positively or negatively oriented. A197654

Symmetric triangle, read by rows of 2·n+1 terms, similar to triangle A008301. Second term 4 times first term. A126150

T(n,k)=Number of nXk 0..2 arrays with no element unequal to more than four of its king-move neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards. A282159

Number of partitions into non-integral powers. A158

Number of points of L1 norm 8 in cubic lattice Zⁿ. A35602

Coordination sequence for C₆ lattice. A19562

Coefficient of·in the reduction by x² -> x+1 of the polynomial p(n,x) defined at Comments. A192953