A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4607460 can be evenly divided by 1 2 3 4 5 6 9 10 11 12 13 15 18 20 22 26 30 33 36 39 44 45 52 55 60 65 66 78 90 99 110 117 130 132 143 156 165 179 180 195 198 220 234 260 286 330 358 390 396 429 468 495 537 572 585 660 715 716 780 858 895 990 1,074 1,170 1,287 1,430 1,611 1,716 1,790 1,969 1,980 2,145 2,148 2,327 2,340 2,574 2,685 2,860 3,222 3,580 3,938 4,290 4,654 5,148 5,370 5,907 6,435 6,444 6,981 7,876 8,055 8,580 9,308 9,845 10,740 11,635 11,814 12,870 13,962 16,110 17,721 19,690 20,943 23,270 23,628 25,597 25,740 27,924 29,535 32,220 34,905 35,442 39,380 41,886 46,540 51,194 59,070 69,810 70,884 76,791 83,772 88,605 102,388 104,715 118,140 127,985 139,620 153,582 177,210 209,430 230,373 255,970 307,164 354,420 383,955 418,860 460,746 511,940 767,910 921,492 1,151,865 1,535,820 2,303,730 and 4,607,460, with no remainder.
Since 4,607,460 cannot be divided by just 1 and 4,607,460, it is not a prime number.