A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2234925 can be evenly divided by 1 3 5 7 9 11 15 21 25 27 33 35 43 45 55 63 75 77 99 105 129 135 165 175 189 215 225 231 275 297 301 315 385 387 473 495 525 645 675 693 825 903 945 1,075 1,155 1,161 1,419 1,485 1,505 1,575 1,925 1,935 2,079 2,365 2,475 2,709 3,225 3,311 3,465 4,257 4,515 4,725 5,775 5,805 7,095 7,425 7,525 8,127 9,675 9,933 10,395 11,825 12,771 13,545 16,555 17,325 21,285 22,575 29,025 29,799 35,475 40,635 49,665 51,975 63,855 67,725 82,775 89,397 106,425 148,995 203,175 248,325 319,275 446,985 744,975 and 2,234,925, with no remainder.
Since 2,234,925 cannot be divided by just 1 and 2,234,925, it is not a prime number.