Properties of the Number 42920

Forty-Two Thousand Nine Hundred Twenty

Basics

Value: 42919 → 42920 → 42921

Parity: even

Prime: No

Previous Prime: 42901

Next Prime: 42923

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 ³ × 5 × 29 × 37

Divisors: 1, 2, 4, 5, 8, 10, 20, 29, 37, 40

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010011110101000

Octal: 123650

Duodecimal: 20A08

Hexadecimal: a7a8

Square: 1842126400

Square Root: 207.17142660125697

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 partitions of n containing a clique of size 1. A183558

a(n) = ∑_k=0..2·n-1 T(n,k) * T(n,k+1), with T given by A026584. A27283

Number of nonnegative solutions to (x₁)² + (x₂)² + ... + (x₇)² <= n. A341402

a(n) = (sum of first n primes) * n. A167214

Numbers k such that 2^k - F(k) is prime, where F(n) is the n-th Fibonacci number. A74716

a(n) = n*(5n² + 3n + 4) / 6. A203551

a(n) = floor( exp(1/16)*n! ). A30907

a(0)=1, a(1)=1, a(n) = 5·a(n-1) + 4·a(n-2). A123270

Numerators of continued fraction convergents to sqrt(992). A42920