Properties of the Number 13122

Thirteen Thousand One Hundred Twenty-Two

Basics

Value: 13121 → 13122 → 13123

Parity: even

Prime: No

Previous Prime: 13121

Next Prime: 13127

Digit Sum: 9

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ⁸

Divisors: 1, 2, 3, 6, 9, 18, 27, 54, 81, 162

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11001101000010

Octal: 31502

Duodecimal: 7716

Hexadecimal: 3342

Square: 172186884

Square Root: 114.5512985522207

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: Yes

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

Pisot sequences E(2,6), L(2,6), P(2,6), T(2,6). A8776

a(2n) = 3ⁿ, a(2n+1) = 2·3ⁿ. A38754

Triangular array: the fusion of (x+1)ⁿ and (x+2)ⁿ; see Comments for the definition of fusion. A193722

a(n) = max{(n - i)*a(i) : i < n}; a(0) = 1. A792

a(0)=1; a(n) = 2·3^n-1 for n >= 1. A25192

Numbers that are the sum of 2 nonzero 8th powers. A3380

Nicomachus triangle read by rows, T(n, k) = 2^{n - k}*3^k, for 0 <= k <= n. A36561

Number of n-step walks (each step +-1 starting from 0) which are never more than 2 or less than -2. A68911

A run-length describing inverse to A181819. The multiplicity of prime(k) in a(n) is the k-th smallest prime index of n, which is A112798(n,k). A304660

Numbers that are the sum of 6 positive 7th powers. A3373