Properties of the Number 42457

Forty-Two Thousand Four Hundred Fifty-Seven

Basics

Value: 42456 → 42457 → 42458

Parity: odd

Prime: Yes

Previous Prime: 42451

Next Prime: 42461

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 42457

Divisors: 1, 42457

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010010111011001

Octal: 122731

Duodecimal: 206A1

Hexadecimal: a5d9

Square: 1802596849

Square Root: 206.0509645694482

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

Integers k such that 10^k+19 is a prime number. A108052

Primes that remain prime when a single digit 7 is inserted between any two consecutive digits or as the leading or trailing digit. A215420

a(n+3) = 2a(n+2) - 3a(n+1) + 2a(n); a(0) = 1, a(1) = 1, a(2) = 0. A105578

Primes p such that the polynomial k⁴ + k³ + k² + k + p yields only primes for k = 0...5. A247949

Fibonacci numbers written in base 8. A4691

Primes p such that the differences between the 5 consecutive primes starting with p are (4,2,4,6). A78952

a(n) = Fibonacci(n) represented in bijective base-8 numeration. A282239

Expansion of (1-x) / (1+x²+2·x³). A78033

Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 14. A31602

Primes p(n) such that p(n) + p(n+3) = p(n+1) + p(n+2) and p(n) + p(n+4) = p(n+2) + p(n+3). A266882