A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4756752 can be evenly divided by 1 2 3 4 6 7 8 9 11 12 13 14 16 18 21 22 24 26 27 28 33 36 39 42 44 48 52 54 56 63 66 72 77 78 84 88 91 99 104 108 112 117 121 126 132 143 144 154 156 168 176 182 189 198 208 216 231 234 242 252 264 273 286 297 308 312 336 351 363 364 378 396 429 432 462 468 484 504 528 546 572 594 616 624 693 702 726 728 756 792 819 847 858 924 936 968 1,001 1,008 1,089 1,092 1,144 1,188 1,232 1,287 1,386 1,404 1,452 1,456 1,512 1,573 1,584 1,638 1,694 1,716 1,848 1,872 1,936 2,002 2,079 2,178 2,184 2,288 2,376 2,457 2,541 2,574 2,772 2,808 2,904 3,003 3,024 3,146 3,267 3,276 3,388 3,432 3,696 3,861 4,004 4,158 4,356 4,368 4,719 4,752 4,914 5,082 5,148 5,544 5,616 5,808 6,006 6,292 6,534 6,552 6,776 6,864 7,623 7,722 8,008 8,316 8,712 9,009 9,438 9,828 10,164 10,296 11,011 11,088 12,012 12,584 13,068 13,104 13,552 14,157 15,246 15,444 16,016 16,632 17,424 18,018 18,876 19,656 20,328 20,592 22,022 22,869 24,024 25,168 26,136 27,027 28,314 30,492 30,888 33,033 33,264 36,036 37,752 39,312 40,656 42,471 44,044 45,738 48,048 52,272 54,054 56,628 60,984 61,776 66,066 72,072 75,504 84,942 88,088 91,476 99,099 108,108 113,256 121,968 132,132 144,144 169,884 176,176 182,952 198,198 216,216 226,512 264,264 297,297 339,768 365,904 396,396 432,432 528,528 594,594 679,536 792,792 1,189,188 1,585,584 2,378,376 and 4,756,752, with no remainder.
Since 4,756,752 cannot be divided by just 1 and 4,756,752, it is not a prime number.