Compare 521 vs 1021
| Property | 521 | 1021 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 5211 | 10211 |
| Prime factorization | 521 | 1021 |
| Divisors count | 2 | 2 |
| Divisors | 1, 521 | 1, 1021 |
| Number of properties | 6 | 8 |
| Chen primes | 70th | |
| Emirps | 38th | |
| Harmonic primes | 61st | |
| Long primes | 62nd | |
| Lucas primes | 8th | |
| Lucky primes | 45th | |
| Primes | 98th | 172nd |
| Pythagorean primes | 46th | 83rd |
| Solinas primes | 39th | 46th |
| Twin primes (1st member) | 25th | |
| Twin primes (2nd member) | 36th | |
| Roman numberals | DXXI | MXXI |
| Base 2 | 10000010012 | 11111111012 |
| Base 3 | 2010223 | 11012113 |
| Base 4 | 200214 | 333314 |
| Base 5 | 40415 | 130415 |
| Base 6 | 22256 | 44216 |
| Base 7 | 13437 | 26567 |
| Base 8 | 10118 | 17758 |
| Base 9 | 6389 | 13549 |
| Base 10 | 52110 | 102110 |
| Base 11 | 43411 | 84911 |
| Base 12 | 37512 | 71112 |
| Base 13 | 31113 | 60713 |
| Base 14 | 29314 | 52d14 |
| Base 15 | 24b15 | 48115 |
| Base 16 | 20916 | 3fd16 |