A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3604500 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 81 89 90 100 108 125 135 150 162 178 180 225 250 267 270 300 324 356 375 405 445 450 500 534 540 675 750 801 810 890 900 1,068 1,125 1,335 1,350 1,500 1,602 1,620 1,780 2,025 2,225 2,250 2,403 2,670 2,700 3,204 3,375 4,005 4,050 4,450 4,500 4,806 5,340 6,675 6,750 7,209 8,010 8,100 8,900 9,612 10,125 11,125 12,015 13,350 13,500 14,418 16,020 20,025 20,250 22,250 24,030 26,700 28,836 33,375 36,045 40,050 40,500 44,500 48,060 60,075 66,750 72,090 80,100 100,125 120,150 133,500 144,180 180,225 200,250 240,300 300,375 360,450 400,500 600,750 720,900 901,125 1,201,500 1,802,250 and 3,604,500, with no remainder.
Since 3,604,500 cannot be divided by just 1 and 3,604,500, it is not a prime number.