Properties of the Number 42921

Forty-Two Thousand Nine Hundred Twenty-One

Basics

Value: 42920 → 42921 → 42922

Parity: odd

Prime: No

Previous Prime: 42901

Next Prime: 42923

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 19 × 251

Divisors: 1, 3, 9, 19, 57, 171, 251, 753, 2259, 4769

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010011110101001

Octal: 123651

Duodecimal: 20A09

Hexadecimal: a7a9

Square: 1842212241

Square Root: 207.17384004743457

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 k such that σ(k*φ(k)) = σ(k)². A82955

Numbers k such that k and k² use only the digits 1, 2, 4, 8 and 9. A137000

Denominators of continued fraction convergents to sqrt(992). A42921