Properties of the Number 42987

Forty-Two Thousand Nine Hundred Eighty-Seven

Basics

Value: 42986 → 42987 → 42988

Parity: odd

Prime: No

Previous Prime: 42979

Next Prime: 42989

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 3 × 7 × 23 × 89

Divisors: 1, 3, 7, 21, 23, 69, 89, 161, 267, 483

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1010011111101011

Octal: 123753

Duodecimal: 20A63

Hexadecimal: a7eb

Square: 1847882169

Square Root: 207.33306538031988

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) = (2·n - 1) * (2ⁿ - 1). A118414

Integers n such that 2n²+1, 2n³+1 and 2n⁴+1 are prime. A239920

Number of n-node unlabeled rooted trees with thinning limbs and root outdegree (branching factor) 6. A244707

Total number of partitions of k·n into 3 parts for k = 1..n. A343124

Primes congruent to {2, 3, 5, 7} mod 8. A42987