Properties of the Number 67421

Sixty-Seven Thousand Four Hundred Twenty-One

Basics

Value: 67420 → 67421 → 67422

Parity: odd

Prime: Yes

Previous Prime: 67411

Next Prime: 67427

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 67421

Divisors: 1, 67421

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000011101011101

Octal: 203535

Duodecimal: 33025

Hexadecimal: 1075d

Square: 4545591241

Square Root: 259.65554105391243

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

Numbers k such that 7·2^k - 1 is prime. A1771

Initial term in sequence of four consecutive primes separated by 3 consecutive differences each <=6 (i.e., when d = 2, 4 or 6) and forming d-pattern=[6,2,4]; short d-string notation of pattern = [624]. A78853

Numbers k such that (14^k - 1)/13 is prime. A6032

Numbers k such that (11^k - 2^k)/9 is prime. A210506

Number of nonnegative solutions to (x₁)² + (x₂)² + ... + (x₉)² <= n. A341404

Primes of the form 6n² + 5. A201600

Primes that are values of A215240. A320041

Primes such that the sum of any two terms, plus one, is a prime. A133761

Primes p such that the left prime neighbors p1, p2 of p as well as the right prime neighbors q1, q2 of p form twin prime pairs and the sum p1 + p2 + p + q1 + q2 is also prime. A138396

Primes p such that sum of squares of even-position digits equals the sum of squares of odd-position digits of p. A76168