A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3253500 can be evenly divided by 1 2 3 4 5 6 9 10 12 15 18 20 25 27 30 36 45 50 54 60 75 90 100 108 125 135 150 180 225 241 250 270 300 375 450 482 500 540 675 723 750 900 964 1,125 1,205 1,350 1,446 1,500 2,169 2,250 2,410 2,700 2,892 3,375 3,615 4,338 4,500 4,820 6,025 6,507 6,750 7,230 8,676 10,845 12,050 13,014 13,500 14,460 18,075 21,690 24,100 26,028 30,125 32,535 36,150 43,380 54,225 60,250 65,070 72,300 90,375 108,450 120,500 130,140 162,675 180,750 216,900 271,125 325,350 361,500 542,250 650,700 813,375 1,084,500 1,626,750 and 3,253,500, with no remainder.
Since 3,253,500 cannot be divided by just 1 and 3,253,500, it is not a prime number.