Compare 1849 vs 1861
| Property | 1849 | 1861 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 1 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 432 | 18611 |
| Prime factorization | 43 × 43 | 1861 |
| Divisors count | 3 | 2 |
| Divisors | 1, 43, 1849 | 1, 1861 |
| Number of properties | 1 | 10 |
| Centered square primes | 15th | |
| Good primes | 58th | |
| Harmonic primes | 103rd | |
| Isolated primes | 173rd | |
| Long primes | 112th | |
| Primes | 284th | |
| Pythagorean primes | 137th | |
| Semiprimes | 533rd | |
| Sexy primes (1st member) | 120th | |
| Sexy prime quadrupletss (1st member) | 12th | |
| Sexy prime triplets (1st member) | 47th | |
| Roman numberals | MDCCCXLIX | MDCCCLXI |
| Base 2 | 111001110012 | 111010001012 |
| Base 3 | 21121113 | 21122213 |
| Base 4 | 1303214 | 1310114 |
| Base 5 | 243445 | 244215 |
| Base 6 | 123216 | 123416 |
| Base 7 | 52517 | 52667 |
| Base 8 | 34718 | 35058 |
| Base 9 | 24749 | 24879 |
| Base 10 | 184910 | 186110 |
| Base 11 | 143111 | 144211 |
| Base 12 | 10a112 | 10b112 |
| Base 13 | ac313 | b0213 |
| Base 14 | 96114 | 96d14 |
| Base 15 | 83415 | 84115 |
| Base 16 | 73916 | 74516 |