Compare 521 vs 1009
| Property | 521 | 1009 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 5211 | 10091 |
| Prime factorization | 521 | 1009 |
| Divisors count | 2 | 2 |
| Divisors | 1, 521 | 1, 1009 |
| Number of properties | 6 | 10 |
| Chen primes | 70th | 116th |
| Cousin primes (1st member) | 42nd | |
| Emirps | 37th | |
| Good primes | 45th | |
| Happy primes | 36th | |
| Isolated primes | 100th | |
| Lucas primes | 8th | |
| Lucky primes | 44th | |
| Primes | 98th | 169th |
| Pythagorean primes | 46th | 81st |
| Solinas primes | 39th | 44th |
| Twin primes (1st member) | 25th | |
| Roman numberals | DXXI | MIX |
| Base 2 | 10000010012 | 11111100012 |
| Base 3 | 2010223 | 11011013 |
| Base 4 | 200214 | 333014 |
| Base 5 | 40415 | 130145 |
| Base 6 | 22256 | 44016 |
| Base 7 | 13437 | 26417 |
| Base 8 | 10118 | 17618 |
| Base 9 | 6389 | 13419 |
| Base 10 | 52110 | 100910 |
| Base 11 | 43411 | 83811 |
| Base 12 | 37512 | 70112 |
| Base 13 | 31113 | 5c813 |
| Base 14 | 29314 | 52114 |
| Base 15 | 24b15 | 47415 |
| Base 16 | 20916 | 3f116 |