Properties of the Number -162180

One Hundred Sixty-Two Thousand One Hundred Eighty

Basics

Value: -162181 → -162180 → -162179

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ² × 3 ² × 5 × 17 × 53

Divisors: 1, 2, 3, 4, 5, 6, 9, 10, 12, 15

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: Yes

Tetrahedral: No

Today's Target

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Representations

Binary: -100111100110000100

Octal: -474604

Duodecimal: -79A30

Hexadecimal: -27984

Square: 26302352400

Square Root: 402.715780669196

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

Numerators b(n) of Pythagorean approximations b(n)/a(n) to sqrt(2/3). A195632

a(n) = 4·a(n-1) - a(n-2) with a(0) = 0, a(1) = 4. A231896

Coordination sequence for 4-dimensional primitive di-isohexagonal orthogonal lattice. A8530

Frobenius number of the numerical semigroup generated by three consecutive pentagonal numbers. A69757