Compare 1801 vs 1861
| Property | 1801 | 1861 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 18011 | 18611 |
| Prime factorization | 1801 | 1861 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1801 | 1, 1861 |
| Number of properties | 7 | 10 |
| Centered square primes | 15th | |
| Chen primes | 174th | |
| Cuban primes 1 | 13th | |
| Good primes | 58th | |
| Harmonic primes | 99th | 103rd |
| Isolated primes | 168th | 173rd |
| Long primes | 112th | |
| Lucky primes | 66th | |
| Primes | 279th | 284th |
| Pythagorean primes | 136th | 137th |
| Sexy primes (1st member) | 120th | |
| Sexy prime quadrupletss (1st member) | 12th | |
| Sexy prime triplets (1st member) | 47th | |
| Roman numberals | MDCCCI | MDCCCLXI |
| Base 2 | 111000010012 | 111010001012 |
| Base 3 | 21102013 | 21122213 |
| Base 4 | 1300214 | 1310114 |
| Base 5 | 242015 | 244215 |
| Base 6 | 122016 | 123416 |
| Base 7 | 51527 | 52667 |
| Base 8 | 34118 | 35058 |
| Base 9 | 24219 | 24879 |
| Base 10 | 180110 | 186110 |
| Base 11 | 139811 | 144211 |
| Base 12 | 106112 | 10b112 |
| Base 13 | a8713 | b0213 |
| Base 14 | 92914 | 96d14 |
| Base 15 | 80115 | 84115 |
| Base 16 | 70916 | 74516 |