Properties of the Number 56805

Fifty-Six Thousand Eight Hundred Five

Basics

Value: 56804 → 56805 → 56806

Parity: odd

Prime: No

Previous Prime: 56783

Next Prime: 56807

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 3 × 5 × 7 × 541

Divisors: 1, 3, 5, 7, 15, 21, 35, 105, 541, 1623

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1101110111100101

Octal: 156745

Duodecimal: 28A59

Hexadecimal: dde5

Square: 3226808025

Square Root: 238.33799529239982

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

a(0)=a(1)=1, a(n) = least k > a(n-1) such that k·a(n-2) is a triangular number. A214961

Sum over all partitions of n of the bitwise OR of the parts. A306902

Total number of ways of partitioning n and any natural number less than or equal to n into the same number of parts, not treating partitions of n and itself in a different order as distinct. A380126

T(n,k) is the number of labeled graphs of n vertices and k edges that have endpoints, where an endpoint is a vertex with degree 1. A245796

Numbers k such that 6·10^k+1 is prime. A56805

Half the number of n X 4 binary arrays with every element equal to exactly one or two of its horizontal and vertical neighbors. A185830

Number of 7Xn 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 1 0 0 vertically. A207504