A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4327752 can be evenly divided by 1 2 3 4 6 8 11 12 13 22 24 26 33 39 44 52 66 78 88 97 104 132 143 156 169 194 264 286 291 312 338 388 429 507 572 582 676 776 858 1,014 1,067 1,144 1,164 1,261 1,352 1,716 1,859 2,028 2,134 2,328 2,522 3,201 3,432 3,718 3,783 4,056 4,268 5,044 5,577 6,402 7,436 7,566 8,536 10,088 11,154 12,804 13,871 14,872 15,132 16,393 22,308 25,608 27,742 30,264 32,786 41,613 44,616 49,179 55,484 65,572 83,226 98,358 110,968 131,144 166,452 180,323 196,716 332,904 360,646 393,432 540,969 721,292 1,081,938 1,442,584 2,163,876 and 4,327,752, with no remainder.
Since 4,327,752 cannot be divided by just 1 and 4,327,752, it is not a prime number.