Compare 1861 vs 4001
| Property | 1861 | 4001 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 18611 | 40011 |
| Prime factorization | 1861 | 4001 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1861 | 1, 4001 |
| Number of properties | 10 | 10 |
| Additive primes | 282nd | |
| Centered square primes | 15th | |
| Chen primes | 321st | |
| Good primes | 58th | 95th |
| Harmonic primes | 103rd | |
| Isolated primes | 173rd | |
| Long primes | 112th | |
| Primes | 284th | 551st |
| Prime triplets (1st member) | 72nd | |
| Pythagorean primes | 137th | 270th |
| Sexy primes (1st member) | 120th | 203rd |
| Sexy prime quadrupletss (1st member) | 12th | 17th |
| Sexy prime triplets (1st member) | 47th | 71st |
| Twin primes (1st member) | 104th | |
| Roman numberals | MDCCCLXI | MMMMI |
| Base 2 | 111010001012 | 1111101000012 |
| Base 3 | 21122213 | 121110123 |
| Base 4 | 1310114 | 3322014 |
| Base 5 | 244215 | 1120015 |
| Base 6 | 123416 | 303056 |
| Base 7 | 52667 | 144447 |
| Base 8 | 35058 | 76418 |
| Base 9 | 24879 | 54359 |
| Base 10 | 186110 | 400110 |
| Base 11 | 144211 | 300811 |
| Base 12 | 10b112 | 239512 |
| Base 13 | b0213 | 1a8a13 |
| Base 14 | 96d14 | 165b14 |
| Base 15 | 84115 | 12bb15 |
| Base 16 | 74516 | fa116 |