A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4528524 can be evenly divided by 1 2 3 4 6 7 11 12 13 14 21 22 26 28 29 33 39 42 44 52 58 66 77 78 84 87 91 116 132 143 154 156 169 174 182 203 231 273 286 308 319 338 348 364 377 406 429 462 507 546 572 609 638 676 754 812 858 924 957 1,001 1,014 1,092 1,131 1,183 1,218 1,276 1,508 1,716 1,859 1,914 2,002 2,028 2,233 2,262 2,366 2,436 2,639 3,003 3,549 3,718 3,828 4,004 4,147 4,466 4,524 4,732 4,901 5,278 5,577 6,006 6,699 7,098 7,436 7,917 8,294 8,932 9,802 10,556 11,154 12,012 12,441 13,013 13,398 14,196 14,703 15,834 16,588 19,604 22,308 24,882 26,026 26,796 29,029 29,406 31,668 34,307 39,039 49,764 52,052 53,911 58,058 58,812 68,614 78,078 87,087 102,921 107,822 116,116 137,228 156,156 161,733 174,174 205,842 215,644 323,466 348,348 377,377 411,684 646,932 754,754 1,132,131 1,509,508 2,264,262 and 4,528,524, with no remainder.
Since 4,528,524 cannot be divided by just 1 and 4,528,524, it is not a prime number.