Properties of the Number 42581

Forty-Two Thousand Five Hundred Eighty-One

Basics

Value: 42580 → 42581 → 42582

Parity: odd

Prime: No

Previous Prime: 42577

Next Prime: 42589

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 7 ² × 11 × 79

Divisors: 1, 7, 11, 49, 77, 79, 539, 553, 869, 3871

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010011001010101

Octal: 123125

Duodecimal: 20785

Hexadecimal: a655

Square: 1813141561

Square Root: 206.35164162177145

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

1/21 of the number of permutations of 6 indistinguishable copies of 1..n with exactly 2 local maxima. A152513

Number of tetrahedra in the n X n queen graph. A388998

Denominators of continued fraction convergents to sqrt(819). A42581