A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4076226 can be evenly divided by 1 2 3 6 7 9 11 14 17 18 21 22 33 34 42 51 63 66 77 99 102 119 126 153 154 173 187 198 231 238 306 346 357 374 462 519 561 693 714 1,038 1,071 1,122 1,211 1,309 1,386 1,557 1,683 1,903 2,142 2,422 2,618 2,941 3,114 3,366 3,633 3,806 3,927 5,709 5,882 7,266 7,854 8,823 10,899 11,418 11,781 13,321 17,127 17,646 20,587 21,798 23,562 26,469 26,642 32,351 34,254 39,963 41,174 52,938 61,761 64,702 79,926 97,053 119,889 123,522 185,283 194,106 226,457 239,778 291,159 370,566 452,914 582,318 679,371 1,358,742 2,038,113 and 4,076,226, with no remainder.
Since 4,076,226 cannot be divided by just 1 and 4,076,226, it is not a prime number.