A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4314492 can be evenly divided by 1 2 3 4 6 7 9 12 13 14 18 21 26 27 28 36 39 42 52 54 63 78 84 91 108 117 126 156 182 189 234 252 273 351 364 378 439 468 546 702 756 819 878 1,092 1,317 1,404 1,638 1,756 2,457 2,634 3,073 3,276 3,951 4,914 5,268 5,707 6,146 7,902 9,219 9,828 11,414 11,853 12,292 15,804 17,121 18,438 22,828 23,706 27,657 34,242 36,876 39,949 47,412 51,363 55,314 68,484 79,898 82,971 102,726 110,628 119,847 154,089 159,796 165,942 205,452 239,694 308,178 331,884 359,541 479,388 616,356 719,082 1,078,623 1,438,164 2,157,246 and 4,314,492, with no remainder.
Since 4,314,492 cannot be divided by just 1 and 4,314,492, it is not a prime number.