Properties of the Number 87565

Eighty-Seven Thousand Five Hundred Sixty-Five

Basics

Value: 87564 → 87565 → 87566

Parity: odd

Prime: No

Previous Prime: 87559

Next Prime: 87583

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 5 × 83 × 211

Divisors: 1, 5, 83, 211, 415, 1055, 17513, 87565

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10101011000001101

Octal: 253015

Duodecimal: 42811

Hexadecimal: 1560d

Square: 7667629225

Square Root: 295.9138388112323

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 n X 2 0..1 arrays with every element equal to 2, 3 or 4 king-move adjacent elements, with upper left element zero. A297860

Numbers n such that 4·10ⁿ + 3·R_n + 4 is prime, where R_n = 11...1 is the repunit (A002275) of length n. A102989

a(n) = smallest k such that n*(n+1)*(n+2)...(n+k) + 1 is prime, or -1 if no prime of such form exists. A87565