Compare 21399 vs 21407
| Property | 21399 | 21407 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 31 × 71 × 10191 | 214071 |
| Prime factorization | 3 × 7 × 1019 | 21407 |
| Divisors count | 8 | 2 |
| Divisors | 1, 3, 7, 21, 1019, 3057, 7133, 21399 | 1, 21407 |
| Number of properties | 0 | 6 |
| Chen primes | 1180th | |
| Happy primes | 398th | |
| Isolated primes | 1679th | |
| Long primes | 911th | |
| Primes | 2404th | |
| Sexy primes (2nd member) | 730th | |
| Roman numberals | ||
| Base 2 | 1010011100101112 | 1010011100111112 |
| Base 3 | 10021001203 | 10021002123 |
| Base 4 | 110321134 | 110321334 |
| Base 5 | 11410445 | 11411125 |
| Base 6 | 2430236 | 2430356 |
| Base 7 | 1162507 | 1162617 |
| Base 8 | 516278 | 516378 |
| Base 9 | 323169 | 323259 |
| Base 10 | 2139910 | 2140710 |
| Base 11 | 1509411 | 150a111 |
| Base 12 | 1047312 | 1047b12 |
| Base 13 | 998113 | 998913 |
| Base 14 | 7b2714 | 7b3114 |
| Base 15 | 651915 | 652215 |
| Base 16 | 539716 | 539f16 |