A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4524520 can be evenly divided by 1 2 4 5 7 8 10 11 13 14 20 22 26 28 35 40 44 52 55 56 65 70 77 88 91 104 110 113 130 140 143 154 182 220 226 260 280 286 308 364 385 440 452 455 520 565 572 616 715 728 770 791 904 910 1,001 1,130 1,144 1,243 1,430 1,469 1,540 1,582 1,820 2,002 2,260 2,486 2,860 2,938 3,080 3,164 3,640 3,955 4,004 4,520 4,972 5,005 5,720 5,876 6,215 6,328 7,345 7,910 8,008 8,701 9,944 10,010 10,283 11,752 12,430 14,690 15,820 16,159 17,402 20,020 20,566 24,860 29,380 31,640 32,318 34,804 40,040 41,132 43,505 49,720 51,415 58,760 64,636 69,608 80,795 82,264 87,010 102,830 113,113 129,272 161,590 174,020 205,660 226,226 323,180 348,040 411,320 452,452 565,565 646,360 904,904 1,131,130 2,262,260 and 4,524,520, with no remainder.
Since 4,524,520 cannot be divided by just 1 and 4,524,520, it is not a prime number.