A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3241350 can be evenly divided by 1 2 3 5 6 7 9 10 14 15 18 21 25 27 30 35 42 45 49 50 54 63 70 75 90 98 105 126 135 147 150 175 189 210 225 245 270 294 315 343 350 378 441 450 490 525 630 675 686 735 882 945 1,029 1,050 1,225 1,323 1,350 1,470 1,575 1,715 1,890 2,058 2,205 2,401 2,450 2,646 3,087 3,150 3,430 3,675 4,410 4,725 4,802 5,145 6,174 6,615 7,203 7,350 8,575 9,261 9,450 10,290 11,025 12,005 13,230 14,406 15,435 17,150 18,522 21,609 22,050 24,010 25,725 30,870 33,075 36,015 43,218 46,305 51,450 60,025 64,827 66,150 72,030 77,175 92,610 108,045 120,050 129,654 154,350 180,075 216,090 231,525 324,135 360,150 463,050 540,225 648,270 1,080,450 1,620,675 and 3,241,350, with no remainder.
Since 3,241,350 cannot be divided by just 1 and 3,241,350, it is not a prime number.