Properties of the Number 87120

Eighty-Seven Thousand One Hundred Twenty

Basics

Value: 87119 → 87120 → 87121

Parity: even

Prime: No

Previous Prime: 87119

Next Prime: 87121

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ⁴ × 3 ² × 5 × 11 ²

Divisors: 1, 2, 3, 4, 5, 6, 8, 9, 10, 11

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 10101010001010000

Octal: 252120

Duodecimal: 42500

Hexadecimal: 15450

Square: 7589894400

Square Root: 295.16097302997224

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

Exponential Riordan array (1, x·cosh(x)). A185951

Expansion of g.f.: (1+x)/(1-44·x). A170764

a(n) = φ(3ⁿ+1), where φ is Euler's totient function (A000010). A366579

List of e-perfect numbers that are not e-unitary perfect. A322858

Least positive integer k such that prime(k)-k, prime(k)+k, prime(k·n)-k·n, prime(k·n)+k·n, prime(k)+k·n and prime(k·n)+k are all prime. A259492

Numbers n = 5·k² such that n - 1 and n + 1 are (twin) primes (thus k=6·m). A154672

Numbers k divisible by at least one nontrivial permutation (rearrangement) of the digits of k, excluding all permutations that result in digit loss. A90056

Coefficients in quasimodular form F₂(q) of level 1 and weight 6. A126858

Numbers m such that (4^m + 5) / 3 is prime. A261539

Number of reduced words of length n in Coxeter group on 45 generators S_i with relations (S_i)² = (S_i S_j)⁹ = I. A165699