Properties of the Number 42409

Forty-Two Thousand Four Hundred Nine

Basics

Value: 42408 → 42409 → 42410

Parity: odd

Prime: Yes

Previous Prime: 42407

Next Prime: 42433

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 42409

Divisors: 1, 42409

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1010010110101001

Octal: 122651

Duodecimal: 20661

Hexadecimal: a5a9

Square: 1798523281

Square Root: 205.93445559206452

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

Lesser of two consecutive primes such that p + n·q is a perfect square, p < q. A64543

Primes with 14 as smallest positive primitive root. A61327

Primes p giving prime quadruples (30p+11, 30p+13, 30p+17, 30p+19). A87771

Primes of the form 13·n²+3·n+1. A176783

Greatest of 4 consecutive primes with consecutive gaps 6, 4, 2. A290635

Primes having only {0, 2, 4, 9} as digits. A386048

Denominators of continued fraction convergents to sqrt(732). A42409

Number of (n+1)X(4+1) 0..1 arrays with every element equal to some horizontal, vertical, diagonal or antidiagonal neighbor, with top left element zero. A231953

Primes that change into other primes of the same length at each of the four possible stages when all of their digits simultaneously shift along the ...8-9-0-1-2-3-4-5-6-7-8-9-0-1-2-3... cycle. No leading zeros and so no differing lengths of the changing primes are allowed. A386601