A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5325012 can be evenly divided by 1 2 3 4 6 7 9 11 12 14 17 18 21 22 28 33 34 36 42 44 51 63 66 68 77 84 99 102 113 119 126 132 153 154 187 198 204 226 231 238 252 306 308 339 357 374 396 452 462 476 561 612 678 693 714 748 791 924 1,017 1,071 1,122 1,243 1,309 1,356 1,386 1,428 1,582 1,683 1,921 2,034 2,142 2,244 2,373 2,486 2,618 2,772 3,164 3,366 3,729 3,842 3,927 4,068 4,284 4,746 4,972 5,236 5,763 6,732 7,119 7,458 7,684 7,854 8,701 9,492 11,187 11,526 11,781 13,447 14,238 14,916 15,708 17,289 17,402 21,131 22,374 23,052 23,562 26,103 26,894 28,476 34,578 34,804 40,341 42,262 44,748 47,124 52,206 53,788 63,393 69,156 78,309 80,682 84,524 104,412 121,023 126,786 147,917 156,618 161,364 190,179 242,046 253,572 295,834 313,236 380,358 443,751 484,092 591,668 760,716 887,502 1,331,253 1,775,004 2,662,506 and 5,325,012, with no remainder.
Since 5,325,012 cannot be divided by just 1 and 5,325,012, it is not a prime number.