Properties of the Number 42543

Forty-Two Thousand Five Hundred Forty-Three

Basics

Value: 42542 → 42543 → 42544

Parity: odd

Prime: No

Previous Prime: 42533

Next Prime: 42557

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 29 × 163

Divisors: 1, 3, 9, 29, 87, 163, 261, 489, 1467, 4727

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010011000101111

Octal: 123057

Duodecimal: 20753

Hexadecimal: a62f

Square: 1809906849

Square Root: 206.25954523366912

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

Partial sums of A299256. A299262

G.f.: exp( ∑_n>=1 σ(2n)*xⁿ/n ). A182818

Integer part of ((4th elementary symmetric function of 1,2,..,n)/(2nd elementary symmetric function of 1,2,...,n)). A24173

G.f. A(x) satisfies: [xⁿ] A( x/A(x)^3·n ) = 0 for n>=1. A300733

Denominators of continued fraction convergents to sqrt(800). A42543

Number of nX4 0..1 arrays with every element both equal and not equal to some elements at offset (-1,-1) (-1,0) (-1,1) (0,-1) (0,1) (1,-1) or (1,0), with upper left element zero. A278153