A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 1173600 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 25 30 32 36 40 45 48 50 60 72 75 80 90 96 100 120 144 150 160 163 180 200 225 240 288 300 326 360 400 450 480 489 600 652 720 800 815 900 978 1,200 1,304 1,440 1,467 1,630 1,800 1,956 2,400 2,445 2,608 2,934 3,260 3,600 3,912 4,075 4,890 5,216 5,868 6,520 7,200 7,335 7,824 8,150 9,780 11,736 12,225 13,040 14,670 15,648 16,300 19,560 23,472 24,450 26,080 29,340 32,600 36,675 39,120 46,944 48,900 58,680 65,200 73,350 78,240 97,800 117,360 130,400 146,700 195,600 234,720 293,400 391,200 586,800 and 1,173,600, with no remainder.
Since 1,173,600 cannot be divided by just 1 and 1,173,600, it is not a prime number.