Compare 1601 vs 1861
| Property | 1601 | 1861 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 16011 | 18611 |
| Prime factorization | 1601 | 1861 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1601 | 1, 1861 |
| Number of properties | 12 | 10 |
| Centered square primes | 15th | |
| Chen primes | 160th | |
| Cousin primes (2nd member) | 57th | |
| Emirps | 78th | |
| Good primes | 58th | |
| Harmonic primes | 85th | 103rd |
| Isolated primes | 153rd | 173rd |
| Long primes | 112th | |
| Primes | 252nd | 284th |
| Proth primes | 21st | |
| Pythagorean primes | 120th | 137th |
| Sexy primes (1st member) | 108th | 120th |
| Sexy prime quadrupletss (1st member) | 10th | 12th |
| Sexy prime triplets (1st member) | 41st | 47th |
| Sophie germain primes | 54th | |
| Roman numberals | MDCI | MDCCCLXI |
| Base 2 | 110010000012 | 111010001012 |
| Base 3 | 20120223 | 21122213 |
| Base 4 | 1210014 | 1310114 |
| Base 5 | 224015 | 244215 |
| Base 6 | 112256 | 123416 |
| Base 7 | 44457 | 52667 |
| Base 8 | 31018 | 35058 |
| Base 9 | 21689 | 24879 |
| Base 10 | 160110 | 186110 |
| Base 11 | 122611 | 144211 |
| Base 12 | b1512 | 10b112 |
| Base 13 | 96213 | b0213 |
| Base 14 | 82514 | 96d14 |
| Base 15 | 71b15 | 84115 |
| Base 16 | 64116 | 74516 |