A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4274424 can be evenly divided by 1 2 3 4 6 7 8 9 11 12 14 18 21 22 24 27 28 33 36 42 44 54 56 63 66 72 77 84 88 99 108 126 132 154 168 189 198 216 231 252 257 264 297 308 378 396 462 504 514 594 616 693 756 771 792 924 1,028 1,188 1,386 1,512 1,542 1,799 1,848 2,056 2,079 2,313 2,376 2,772 2,827 3,084 3,598 4,158 4,626 5,397 5,544 5,654 6,168 6,939 7,196 8,316 8,481 9,252 10,794 11,308 13,878 14,392 16,191 16,632 16,962 18,504 19,789 21,588 22,616 25,443 27,756 32,382 33,924 39,578 43,176 48,573 50,886 55,512 59,367 64,764 67,848 76,329 79,156 97,146 101,772 118,734 129,528 152,658 158,312 178,101 194,292 203,544 237,468 305,316 356,202 388,584 474,936 534,303 610,632 712,404 1,068,606 1,424,808 2,137,212 and 4,274,424, with no remainder.
Since 4,274,424 cannot be divided by just 1 and 4,274,424, it is not a prime number.