Properties of the Number 42839

Forty-Two Thousand Eight Hundred Thirty-Nine

Basics

Value: 42838 → 42839 → 42840

Parity: odd

Prime: Yes

Previous Prime: 42829

Next Prime: 42841

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 42839

Divisors: 1, 42839

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1010011101010111

Octal: 123527

Duodecimal: 2095B

Hexadecimal: a757

Square: 1835179921

Square Root: 206.97584400117807

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 - k - 1. A116581

a(n) = n³ - n - 1. A126420

List of primes p1 such that (p1,p2) are twin primes where both 2·p1+p2 and p1+2·p2 are primes. A174920

Smaller of twin primes whose middle term is a multiple of A002110(4)=210. A60230

Primes which produce records in A157188, at index i=π(a(n)) (π=A000720). A157190

The least prime p such that equation x = p·sopf(x) (where sopf(x) is the sum of distinct prime factors of x) has exactly n solutions in positive integers. A336296

a(n) is smallest safe prime (A005385) such that a(n) + 12·n is the next safe prime, i.e., x = (a(n) - 1)/2 and x + 6·n are closest Sophie Germain primes. A59327

Primes p such that p³ - 1 has 8 divisors. A341659

The lesser of twin primes p1 such that 2·p1 + p2 is a prime number (A174913) and also the lesser of other twin primes in A174913. A242772

The number of nonnegative integers that have a shortest divisor addition chain of length n. A352079