Properties of the Number 87180

Eighty-Seven Thousand One Hundred Eighty

Basics

Value: 87179 → 87180 → 87181

Parity: even

Prime: No

Previous Prime: 87179

Next Prime: 87181

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 ² × 3 × 5 × 1453

Divisors: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10101010010001100

Octal: 252214

Duodecimal: 42550

Hexadecimal: 1548c

Square: 7600352400

Square Root: 295.2625949896126

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 permutations i₀,i₁,...,i_n of 0,1,...,n with i₀ = 0 and i_n = n, and with i₀+i₁, i₁+i₂, ..., i_n-1+i_n, i_n+i₀ all coprime to both n-1 and n+1. A228886

a(n) = a(1) + a(2) + ... + a(n-1) + a(m) for n >= 4, where m = 2^p+1 + 2 - n and p is the unique integer such that 2^p < n - 1 <= 2^p+1, starting with a(1) = 1, a(2) = 3, and a(3) = 2. A49969

Number partition numbers <= P(n) of the form 3·k (P = A000041). A87180