A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 914004 can be evenly divided by 1 2 3 4 6 7 9 12 13 14 18 21 26 27 28 31 36 39 42 52 54 62 63 78 81 84 91 93 108 117 124 126 156 162 182 186 189 217 234 252 273 279 324 351 364 372 378 403 434 468 546 558 567 651 702 756 806 819 837 868 1,053 1,092 1,116 1,134 1,209 1,302 1,404 1,612 1,638 1,674 1,953 2,106 2,268 2,418 2,457 2,511 2,604 2,821 3,276 3,348 3,627 3,906 4,212 4,836 4,914 5,022 5,642 5,859 7,254 7,371 7,812 8,463 9,828 10,044 10,881 11,284 11,718 14,508 14,742 16,926 17,577 21,762 23,436 25,389 29,484 32,643 33,852 35,154 43,524 50,778 65,286 70,308 76,167 101,556 130,572 152,334 228,501 304,668 457,002 and 914,004, with no remainder.
Since 914,004 cannot be divided by just 1 and 914,004, it is not a prime number.