A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3297450 can be evenly divided by 1 2 3 5 6 10 13 15 19 25 26 30 38 39 50 57 65 75 78 89 95 114 130 150 178 190 195 247 267 285 325 390 445 475 494 534 570 650 741 890 950 975 1,157 1,235 1,335 1,425 1,482 1,691 1,950 2,225 2,314 2,470 2,670 2,850 3,382 3,471 3,705 4,450 5,073 5,785 6,175 6,675 6,942 7,410 8,455 10,146 11,570 12,350 13,350 16,910 17,355 18,525 21,983 25,365 28,925 34,710 37,050 42,275 43,966 50,730 57,850 65,949 84,550 86,775 109,915 126,825 131,898 173,550 219,830 253,650 329,745 549,575 659,490 1,099,150 1,648,725 and 3,297,450, with no remainder.
Since 3,297,450 cannot be divided by just 1 and 3,297,450, it is not a prime number.