Properties of the Number 87121

Eighty-Seven Thousand One Hundred Twenty-One

Basics

Value: 87120 → 87121 → 87122

Parity: odd

Prime: Yes

Previous Prime: 87119

Next Prime: 87133

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 87121

Divisors: 1, 87121

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10101010001010001

Octal: 252121

Duodecimal: 42501

Hexadecimal: 15451

Square: 7590068641

Square Root: 295.16266701600324

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

Primes of the form k³ + k² + 1. A120479

Crystal ball sequence for the A2·A2 lattice. A143008

Primes of the form 5k² + 1. A137530

a(n) = 80·n² + 1. A158776

Prime numbers p such that p +- ((p-1)/8) are primes. A137771

Primes of the form n²*totient(n)+1 (or A053191(n) + 1). A76669

Largest order of permutations of n elements with no fixed points. A123131

Take bounded lunar divisors of n as defined in A087028, add them using lunar addition. See A087082 for their conventional sum. A87121