A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 1194720 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 19 20 24 30 32 38 40 48 57 60 76 80 95 96 114 120 131 152 160 190 228 240 262 285 304 380 393 456 480 524 570 608 655 760 786 912 1,048 1,140 1,310 1,520 1,572 1,824 1,965 2,096 2,280 2,489 2,620 3,040 3,144 3,930 4,192 4,560 4,978 5,240 6,288 7,467 7,860 9,120 9,956 10,480 12,445 12,576 14,934 15,720 19,912 20,960 24,890 29,868 31,440 37,335 39,824 49,780 59,736 62,880 74,670 79,648 99,560 119,472 149,340 199,120 238,944 298,680 398,240 597,360 and 1,194,720, with no remainder.
Since 1,194,720 cannot be divided by just 1 and 1,194,720, it is not a prime number.