A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4975680 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 20 24 30 32 40 48 60 64 71 73 80 96 120 142 146 160 192 213 219 240 284 292 320 355 365 426 438 480 568 584 710 730 852 876 960 1,065 1,095 1,136 1,168 1,420 1,460 1,704 1,752 2,130 2,190 2,272 2,336 2,840 2,920 3,408 3,504 4,260 4,380 4,544 4,672 5,183 5,680 5,840 6,816 7,008 8,520 8,760 10,366 11,360 11,680 13,632 14,016 15,549 17,040 17,520 20,732 22,720 23,360 25,915 31,098 34,080 35,040 41,464 51,830 62,196 68,160 70,080 77,745 82,928 103,660 124,392 155,490 165,856 207,320 248,784 310,980 331,712 414,640 497,568 621,960 829,280 995,136 1,243,920 1,658,560 2,487,840 and 4,975,680, with no remainder.
Since 4,975,680 cannot be divided by just 1 and 4,975,680, it is not a prime number.