A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 9196572 can be evenly divided by 1 2 3 4 6 7 11 12 14 21 22 28 33 37 42 44 66 74 77 84 111 132 148 154 222 231 259 269 308 407 444 462 518 538 777 807 814 924 1,036 1,076 1,221 1,554 1,614 1,628 1,883 2,442 2,849 2,959 3,108 3,228 3,766 4,884 5,649 5,698 5,918 7,532 8,547 8,877 9,953 11,298 11,396 11,836 17,094 17,754 19,906 20,713 22,596 29,859 34,188 35,508 39,812 41,426 59,718 62,139 69,671 82,852 109,483 119,436 124,278 139,342 209,013 218,966 248,556 278,684 328,449 418,026 437,932 656,898 766,381 836,052 1,313,796 1,532,762 2,299,143 3,065,524 4,598,286 and 9,196,572, with no remainder.
Since 9,196,572 cannot be divided by just 1 and 9,196,572, it is not a prime number.