Properties of the Number 42799

Forty-Two Thousand Seven Hundred Ninety-Nine

Basics

Value: 42798 → 42799 → 42800

Parity: odd

Prime: No

Previous Prime: 42797

Next Prime: 42821

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 127 × 337

Divisors: 1, 127, 337, 42799

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1010011100101111

Octal: 123457

Duodecimal: 20927

Hexadecimal: a72f

Square: 1831754401

Square Root: 206.87919180043215

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

Strong pseudoprimes to base 2. A1262

Euler pseudoprimes: composite numbers n such that 2^(n-1/2) == +-1 (mod n). A6970

Euler-Jacobi pseudoprimes: 2^(n-1/2) == (2 / n) mod n, where (2 / n) is a Jacobi symbol. A47713

Super-Poulet numbers: Poulet numbers whose divisors d all satisfy d∣2^d-2. A50217

Composite numbers k such that k == +-1 (mod 8) and 2^(k-1/2) == 1 (mod k). A6971

a(n) = (n^n-1-1)/(n-1)². A60073

Fermat pseudoprimes to base 2 with two prime factors. A214305

Strong pseudoprimes to base 4. A20230

a(n) = (2^A002326(n)-1)/(2·n+1). A165781

Strong pseudoprimes to base 8. A20234