Compare 401 vs 521
| Property | 401 | 521 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 4011 | 5211 |
| Prime factorization | 401 | 521 |
| Divisors count | 2 | 2 |
| Divisors | 1, 401 | 1, 521 |
| Number of properties | 7 | 6 |
| Additive primes | 46th | |
| Chen primes | 56th | 70th |
| Cousin primes (2nd member) | 22nd | |
| Isolated primes | 38th | |
| Lucas primes | 8th | |
| Primes | 79th | 98th |
| Pythagorean primes | 38th | 46th |
| Solinas primes | 39th | |
| Super primes | 22nd | |
| Twin primes (1st member) | 25th | |
| Roman numberals | CDI | DXXI |
| Base 2 | 1100100012 | 10000010012 |
| Base 3 | 1122123 | 2010223 |
| Base 4 | 121014 | 200214 |
| Base 5 | 31015 | 40415 |
| Base 6 | 15056 | 22256 |
| Base 7 | 11127 | 13437 |
| Base 8 | 6218 | 10118 |
| Base 9 | 4859 | 6389 |
| Base 10 | 40110 | 52110 |
| Base 11 | 33511 | 43411 |
| Base 12 | 29512 | 37512 |
| Base 13 | 24b13 | 31113 |
| Base 14 | 20914 | 29314 |
| Base 15 | 1bb15 | 24b15 |
| Base 16 | 19116 | 20916 |