A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 8502480 can be evenly divided by 1 2 3 4 5 6 7 8 9 10 12 14 15 16 18 20 21 24 28 30 35 36 40 42 45 48 49 56 60 63 70 72 80 84 90 98 105 112 120 126 140 144 147 168 180 196 210 240 241 245 252 280 294 315 336 360 392 420 441 482 490 504 560 588 630 720 723 735 784 840 882 964 980 1,008 1,176 1,205 1,260 1,446 1,470 1,680 1,687 1,764 1,928 1,960 2,169 2,205 2,352 2,410 2,520 2,892 2,940 3,374 3,528 3,615 3,856 3,920 4,338 4,410 4,820 5,040 5,061 5,784 5,880 6,748 7,056 7,230 8,435 8,676 8,820 9,640 10,122 10,845 11,568 11,760 11,809 13,496 14,460 15,183 16,870 17,352 17,640 19,280 20,244 21,690 23,618 25,305 26,992 28,920 30,366 33,740 34,704 35,280 35,427 40,488 43,380 47,236 50,610 57,840 59,045 60,732 67,480 70,854 75,915 80,976 86,760 94,472 101,220 106,281 118,090 121,464 134,960 141,708 151,830 173,520 177,135 188,944 202,440 212,562 236,180 242,928 283,416 303,660 354,270 404,880 425,124 472,360 531,405 566,832 607,320 708,540 850,248 944,720 1,062,810 1,214,640 1,417,080 1,700,496 2,125,620 2,834,160 4,251,240 and 8,502,480, with no remainder.
Since 8,502,480 cannot be divided by just 1 and 8,502,480, it is not a prime number.