Compare 61 vs 1801
| Property | 61 | 1801 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 611 | 18011 |
| Prime factorization | 61 | 1801 |
| Divisors count | 2 | 2 |
| Divisors | 1, 61 | 1, 1801 |
| Number of properties | 12 | 7 |
| Additive primes | 11th | |
| Centered decagonal primes | 3rd | |
| Centered square primes | 4th | |
| Chen primes | 174th | |
| Cuban primes 1 | 4th | 13th |
| Harmonic primes | 99th | |
| Isolated primes | 168th | |
| Long primes | 8th | |
| Lucky primes | 66th | |
| Primes | 18th | 279th |
| Pythagorean primes | 8th | 136th |
| Sexy primes (1st member) | 12th | |
| Sexy prime quadrupletss (1st member) | 4th | |
| Sexy prime triplets (1st member) | 8th | |
| Solinas primes | 15th | |
| Twin primes (2nd member) | 7th | |
| Roman numberals | LXI | MDCCCI |
| Base 2 | 1111012 | 111000010012 |
| Base 3 | 20213 | 21102013 |
| Base 4 | 3314 | 1300214 |
| Base 5 | 2215 | 242015 |
| Base 6 | 1416 | 122016 |
| Base 7 | 1157 | 51527 |
| Base 8 | 758 | 34118 |
| Base 9 | 679 | 24219 |
| Base 10 | 6110 | 180110 |
| Base 11 | 5611 | 139811 |
| Base 12 | 5112 | 106112 |
| Base 13 | 4913 | a8713 |
| Base 14 | 4514 | 92914 |
| Base 15 | 4115 | 80115 |
| Base 16 | 3d16 | 70916 |