Properties of the Number 42439

Forty-Two Thousand Four Hundred Thirty-Nine

Basics

Value: 42438 → 42439 → 42440

Parity: odd

Prime: No

Previous Prime: 42437

Next Prime: 42443

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 31 × 37 ²

Divisors: 1, 31, 37, 1147, 1369, 42439

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010010111000111

Octal: 122707

Duodecimal: 20687

Hexadecimal: a5c7

Square: 1801068721

Square Root: 206.0072814247108

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

Numbers that are the sum of 9 positive 9th powers. A3398

a(n) = floor(sqrt(n⁷)). A155014

Maximal non-semiprime number which is a "preprime" of the n-th kind (defined in comment in A247395). A247834

Upper bound for the determinant of an n X n matrix whose entries are a permutation of the multiset {1ⁿ,...,nⁿ}. A328031

Powers of sqrt(21) rounded down. A17967

Numerators of continued fraction convergents to sqrt(859). A42658

Powers of sqrt(21) rounded to nearest integer. A17968

Powers of fourth root of 21 rounded down. A18105

Products p³ or p²*q, where {p,q} are consecutive primes. A33477

G.f.: ∑_n=-oo..+oo xⁿ * (1 - xⁿ)^3·n. A268298