Properties of the Number 21067

Twenty-One Thousand Sixty-Seven

Basics

Value: 21066 → 21067 → 21068

Parity: odd

Prime: Yes

Previous Prime: 21061

Next Prime: 21089

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 21067

Divisors: 1, 21067

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001001001011

Octal: 51113

Duodecimal: 10237

Hexadecimal: 524b

Square: 443818489

Square Root: 145.1447553306698

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

Euclid-Mullin sequence (A000945) with initial value a(1)=8191 instead of a(1)=2. A51334

Number of nonagons that can be formed with perimeter n. A288255

Discriminants of imaginary quadratic fields with class number 17 (negated). A46014

a(n) is the n-th prime whose decimal expansion begins with the decimal expansion of n. A77345

Primes that remain prime through 4 iterations of function f(x) = 9x + 10. A23327

Primes that remain prime through 5 iterations of function f(x) = 9x + 10. A23355

Primes of the form n²+42. A174812

Number of partitions of n such that 4*(greatest part) >= (number of parts). A347868

Primes congruent to 22 mod 61. A142820

Primes of the form floor(k^sqrt(π)). A180452