A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2752750 can be evenly divided by 1 2 5 7 10 11 13 14 22 25 26 35 50 55 65 70 77 91 110 121 125 130 143 154 175 182 242 250 275 286 325 350 385 455 550 605 650 715 770 847 875 910 1,001 1,210 1,375 1,430 1,573 1,625 1,694 1,750 1,925 2,002 2,275 2,750 3,025 3,146 3,250 3,575 3,850 4,235 4,550 5,005 6,050 7,150 7,865 8,470 9,625 10,010 11,011 11,375 15,125 15,730 17,875 19,250 21,175 22,022 22,750 25,025 30,250 35,750 39,325 42,350 50,050 55,055 78,650 105,875 110,110 125,125 196,625 211,750 250,250 275,275 393,250 550,550 1,376,375 and 2,752,750, with no remainder.
Since 2,752,750 cannot be divided by just 1 and 2,752,750, it is not a prime number.