Properties of the Number 87857

Eighty-Seven Thousand Eight Hundred Fifty-Seven

Basics

Value: 87856 → 87857 → 87858

Parity: odd

Prime: No

Previous Prime: 87853

Next Prime: 87869

Digit Sum: 35

Digital Root: 8

Palindrome: No

Factorization: 7 ² × 11 × 163

Divisors: 1, 7, 11, 49, 77, 163, 539, 1141, 1793, 7987

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10101011100110001

Octal: 253461

Duodecimal: 42A15

Hexadecimal: 15731

Square: 7718852449

Square Root: 296.4068150363618

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

a(n) = ∑_{1 <= x₁, x₂, x₃ <= n} ( gcd(x₁, n)/gcd(x₁, x₂, x₃, n) )². A371492

a(n) = 76·n² + 1. A158767

Recip transform of 2*(1 + x² + x⁵)-1/(1-x). A49156

Primes of the form 16·m² + 25 for m=1,2,3,... A87857