A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4365312 can be evenly divided by 1 2 3 4 6 7 8 12 14 16 21 24 28 29 32 42 48 49 56 58 64 84 87 96 98 112 116 128 147 168 174 192 196 203 224 232 256 294 336 348 384 392 406 448 464 512 588 609 672 696 768 784 812 896 928 1,024 1,176 1,218 1,344 1,392 1,421 1,536 1,568 1,624 1,792 1,856 2,352 2,436 2,688 2,784 2,842 3,072 3,136 3,248 3,584 3,712 4,263 4,704 4,872 5,376 5,568 5,684 6,272 6,496 7,168 7,424 8,526 9,408 9,744 10,752 11,136 11,368 12,544 12,992 14,848 17,052 18,816 19,488 21,504 22,272 22,736 25,088 25,984 29,696 34,104 37,632 38,976 44,544 45,472 50,176 51,968 68,208 75,264 77,952 89,088 90,944 103,936 136,416 150,528 155,904 181,888 207,872 272,832 311,808 363,776 545,664 623,616 727,552 1,091,328 1,455,104 2,182,656 and 4,365,312, with no remainder.
Since 4,365,312 cannot be divided by just 1 and 4,365,312, it is not a prime number.