A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 1739010 can be evenly divided by 1 2 3 5 6 7 10 13 14 15 21 26 30 35 39 42 49 65 70 78 91 98 105 130 147 169 182 195 210 245 273 294 338 343 390 455 490 507 546 637 686 735 845 910 1,014 1,029 1,183 1,274 1,365 1,470 1,690 1,715 1,911 2,058 2,366 2,535 2,730 3,185 3,430 3,549 3,822 4,459 5,070 5,145 5,915 6,370 7,098 8,281 8,918 9,555 10,290 11,830 13,377 16,562 17,745 19,110 22,295 24,843 26,754 35,490 41,405 44,590 49,686 57,967 66,885 82,810 115,934 124,215 133,770 173,901 248,430 289,835 347,802 579,670 869,505 and 1,739,010, with no remainder.
Since 1,739,010 cannot be divided by just 1 and 1,739,010, it is not a prime number.