Compare 1801 vs 1812
| Property | 1801 | 1812 | 
|---|---|---|
| Type | prime | composite number | 
| Unique factors | 1 | 3 | 
| Total factors | 1 | 4 | 
| Prime factorization | 18011 | 22 × 31 × 1511 | 
| Prime factorization | 1801 | 2 × 2 × 3 × 151 | 
| Divisors count | 2 | 12 | 
| Divisors | 1, 1801 | 1, 2, 3, 4, 6, 12, 151, 302, 453, 604, 906, 1812 | 
| Number of properties | 7 | 0 | 
| Chen primes | 174th | |
| Cuban primes 1 | 13th | |
| Harmonic primes | 99th | |
| Isolated primes | 168th | |
| Lucky primes | 66th | |
| Primes | 279th | |
| Pythagorean primes | 136th | |
| Roman numberals | MDCCCI | MDCCCXII | 
| Base 2 | 111000010012 | 111000101002 | 
| Base 3 | 21102013 | 21110103 | 
| Base 4 | 1300214 | 1301104 | 
| Base 5 | 242015 | 242225 | 
| Base 6 | 122016 | 122206 | 
| Base 7 | 51527 | 51667 | 
| Base 8 | 34118 | 34248 | 
| Base 9 | 24219 | 24339 | 
| Base 10 | 180110 | 181210 | 
| Base 11 | 139811 | 13a811 | 
| Base 12 | 106112 | 107012 | 
| Base 13 | a8713 | a9513 | 
| Base 14 | 92914 | 93614 | 
| Base 15 | 80115 | 80c15 | 
| Base 16 | 70916 | 71416 |