A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2754675 can be evenly divided by 1 3 5 7 9 11 15 21 25 27 33 35 45 53 55 63 75 77 99 105 135 159 165 175 189 225 231 265 275 297 315 371 385 477 495 525 583 675 693 795 825 945 1,113 1,155 1,325 1,431 1,485 1,575 1,749 1,855 1,925 2,079 2,385 2,475 2,915 3,339 3,465 3,975 4,081 4,725 5,247 5,565 5,775 7,155 7,425 8,745 9,275 10,017 10,395 11,925 12,243 14,575 15,741 16,695 17,325 20,405 26,235 27,825 35,775 36,729 43,725 50,085 51,975 61,215 78,705 83,475 102,025 110,187 131,175 183,645 250,425 306,075 393,525 550,935 918,225 and 2,754,675, with no remainder.
Since 2,754,675 cannot be divided by just 1 and 2,754,675, it is not a prime number.