Properties of the Number 42545

Forty-Two Thousand Five Hundred Forty-Five

Basics

Value: 42544 → 42545 → 42546

Parity: odd

Prime: No

Previous Prime: 42533

Next Prime: 42557

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 5 × 67 × 127

Divisors: 1, 5, 67, 127, 335, 635, 8509, 42545

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 1010011000110001

Octal: 123061

Duodecimal: 20755

Hexadecimal: a631

Square: 1810077025

Square Root: 206.26439343716112

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

a(n) = ∑_{k=0..floor(n/3)} 2^n-3·k * binomial(2·n-4·k+1,2·k+1). A387695

Numbers k such that k·14^k + 1 is prime. A242197

Numbers of people such that the first person is freed in the variant of the Josephus problem in which one person is skipped, then one is eliminated, then two people are skipped and one eliminated, then three people are skipped and so on. A386305

Decimal expansion of self-generating continued fraction with first term 2. A229920

Denominators of continued fraction convergents to sqrt(801). A42545