A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3552000 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 20 24 25 30 32 37 40 48 50 60 64 74 75 80 96 100 111 120 125 128 148 150 160 185 192 200 222 240 250 256 296 300 320 370 375 384 400 444 480 500 555 592 600 640 740 750 768 800 888 925 960 1,000 1,110 1,184 1,200 1,280 1,480 1,500 1,600 1,776 1,850 1,920 2,000 2,220 2,368 2,400 2,775 2,960 3,000 3,200 3,552 3,700 3,840 4,000 4,440 4,625 4,736 4,800 5,550 5,920 6,000 6,400 7,104 7,400 8,000 8,880 9,250 9,472 9,600 11,100 11,840 12,000 13,875 14,208 14,800 16,000 17,760 18,500 19,200 22,200 23,680 24,000 27,750 28,416 29,600 32,000 35,520 37,000 44,400 47,360 48,000 55,500 59,200 71,040 74,000 88,800 96,000 111,000 118,400 142,080 148,000 177,600 222,000 236,800 296,000 355,200 444,000 592,000 710,400 888,000 1,184,000 1,776,000 and 3,552,000, with no remainder.
Since 3,552,000 cannot be divided by just 1 and 3,552,000, it is not a prime number.