A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3241050 can be evenly divided by 1 2 3 5 6 10 15 17 25 30 31 34 41 50 51 62 75 82 85 93 102 123 150 155 170 186 205 246 255 310 410 425 465 510 527 615 697 775 850 930 1,025 1,054 1,230 1,271 1,275 1,394 1,550 1,581 2,050 2,091 2,325 2,542 2,550 2,635 3,075 3,162 3,485 3,813 4,182 4,650 5,270 6,150 6,355 6,970 7,626 7,905 10,455 12,710 13,175 15,810 17,425 19,065 20,910 21,607 26,350 31,775 34,850 38,130 39,525 43,214 52,275 63,550 64,821 79,050 95,325 104,550 108,035 129,642 190,650 216,070 324,105 540,175 648,210 1,080,350 1,620,525 and 3,241,050, with no remainder.
Since 3,241,050 cannot be divided by just 1 and 3,241,050, it is not a prime number.