Properties of the Number 11556

Eleven Thousand Five Hundred Fifty-Six

Basics

Value: 11555 → 11556 → 11557

Parity: even

Prime: No

Previous Prime: 11551

Next Prime: 11579

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ² × 3 ³ × 107

Divisors: 1, 2, 3, 4, 6, 9, 12, 18, 27, 36

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10110100100100

Octal: 26444

Duodecimal: 6830

Hexadecimal: 2d24

Square: 133541136

Square Root: 107.49883720301351

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 partitions of 2·n with no part divisible by 3 and all odd parts occurring with even multiplicities. A98151

Amicable triples: numbers such that σ(x) = σ(y) = σ(z) = x+y+z, x<y<z. We order these triples according to the common value of σ. Sequence gives z numbers. A125492

Fibonacci sequence beginning 2, 6. A22112

Product of a prime and the following number. A36690

Numbers k such that the decimal expansions of both k and k² have 1 as smallest digit and 6 as largest digit. A257197

6 times pentagonal numbers: a(n) = 3·n*(3·n-1). A152743

T(n,k)=Number of nXk binary arrays without the pattern 0 0 diagonally or vertically. A188706

Numbers k such that σ(k) divides σ(σ(k)). A66961

Triangle version of the array of the number of closed paths of even length on the graph P_n (n vertices, n-1 edges). A198632

Numbers that belong to at least one amicable multiset. A259307