A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 1364352 can be evenly divided by 1 2 3 4 6 8 11 12 16 17 19 22 24 32 33 34 38 44 48 51 57 64 66 68 76 88 96 102 114 128 132 136 152 176 187 192 204 209 228 264 272 304 323 352 374 384 408 418 456 528 544 561 608 627 646 704 748 816 836 912 969 1,056 1,088 1,122 1,216 1,254 1,292 1,408 1,496 1,632 1,672 1,824 1,938 2,112 2,176 2,244 2,432 2,508 2,584 2,992 3,264 3,344 3,553 3,648 3,876 4,224 4,488 5,016 5,168 5,984 6,528 6,688 7,106 7,296 7,752 8,976 10,032 10,336 10,659 11,968 13,376 14,212 15,504 17,952 20,064 20,672 21,318 23,936 26,752 28,424 31,008 35,904 40,128 41,344 42,636 56,848 62,016 71,808 80,256 85,272 113,696 124,032 170,544 227,392 341,088 454,784 682,176 and 1,364,352, with no remainder.
Since 1,364,352 cannot be divided by just 1 and 1,364,352, it is not a prime number.