A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2754150 can be evenly divided by 1 2 3 5 6 7 10 14 15 21 25 30 35 42 43 50 61 70 75 86 105 122 129 150 175 183 210 215 258 301 305 350 366 427 430 525 602 610 645 854 903 915 1,050 1,075 1,281 1,290 1,505 1,525 1,806 1,830 2,135 2,150 2,562 2,623 3,010 3,050 3,225 4,270 4,515 4,575 5,246 6,405 6,450 7,525 7,869 9,030 9,150 10,675 12,810 13,115 15,050 15,738 18,361 21,350 22,575 26,230 32,025 36,722 39,345 45,150 55,083 64,050 65,575 78,690 91,805 110,166 131,150 183,610 196,725 275,415 393,450 459,025 550,830 918,050 1,377,075 and 2,754,150, with no remainder.
Since 2,754,150 cannot be divided by just 1 and 2,754,150, it is not a prime number.