Properties of the Number 42825

Forty-Two Thousand Eight Hundred Twenty-Five

Basics

Value: 42824 → 42825 → 42826

Parity: odd

Prime: No

Previous Prime: 42821

Next Prime: 42829

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 ² × 571

Divisors: 1, 3, 5, 15, 25, 75, 571, 1713, 2855, 8565

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010011101001001

Octal: 123511

Duodecimal: 20949

Hexadecimal: a749

Square: 1833980625

Square Root: 206.94202086574876

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

Number of antichains in the first n elements of the infinite Boolean lattice. A132581

a(1)=1, a(n) = a(n-1) + n³ if n odd, a(n) = a(n-1) + n⁵ if n is even. A140156

Number of (n+2) X (2+2) 0..3 arrays with every consecutive three elements in every row and column having exactly two distinct values, and in every diagonal and antidiagonal not having exactly two distinct values, and new values 0 upwards introduced in row major order. A252689

Numbers·whose 10's complements y have the same sum of divisors of x, with x <> y. A300796

T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every consecutive three elements in every row and column having exactly two distinct values, and in every diagonal and antidiagonal not having exactly two distinct values, and new values 0 upwards introduced in row major order. A252695

Denominators of continued fraction convergents to sqrt(943). A42825