Compare 421 vs 521
| Property | 421 | 521 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 4211 | 5211 |
| Prime factorization | 421 | 521 |
| Divisors count | 2 | 2 |
| Divisors | 1, 421 | 1, 521 |
| Number of properties | 6 | 6 |
| Additive primes | 48th | |
| Centered square primes | 8th | |
| Chen primes | 70th | |
| Lucas primes | 8th | |
| Lucky primes | 23rd | |
| Primes | 82nd | 98th |
| Pythagorean primes | 40th | 46th |
| Solinas primes | 39th | |
| Twin primes (1st member) | 25th | |
| Twin primes (2nd member) | 22nd | |
| Roman numberals | CDXXI | DXXI |
| Base 2 | 1101001012 | 10000010012 |
| Base 3 | 1201213 | 2010223 |
| Base 4 | 122114 | 200214 |
| Base 5 | 31415 | 40415 |
| Base 6 | 15416 | 22256 |
| Base 7 | 11417 | 13437 |
| Base 8 | 6458 | 10118 |
| Base 9 | 5179 | 6389 |
| Base 10 | 42110 | 52110 |
| Base 11 | 35311 | 43411 |
| Base 12 | 2b112 | 37512 |
| Base 13 | 26513 | 31113 |
| Base 14 | 22114 | 29314 |
| Base 15 | 1d115 | 24b15 |
| Base 16 | 1a516 | 20916 |