A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5079270 can be evenly divided by 1 2 3 5 6 7 10 14 15 19 21 30 35 38 42 57 67 70 95 105 114 133 134 190 201 210 266 285 335 361 399 402 469 570 665 670 722 798 938 1,005 1,083 1,273 1,330 1,407 1,805 1,995 2,010 2,166 2,345 2,527 2,546 2,814 3,610 3,819 3,990 4,690 5,054 5,415 6,365 7,035 7,581 7,638 8,911 10,830 12,635 12,730 14,070 15,162 17,822 19,095 24,187 25,270 26,733 37,905 38,190 44,555 48,374 53,466 72,561 75,810 89,110 120,935 133,665 145,122 169,309 241,870 267,330 338,618 362,805 507,927 725,610 846,545 1,015,854 1,693,090 2,539,635 and 5,079,270, with no remainder.
Since 5,079,270 cannot be divided by just 1 and 5,079,270, it is not a prime number.