A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3069120 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 20 23 24 30 32 40 46 48 60 64 69 80 92 96 115 120 138 139 160 184 192 230 240 276 278 320 345 368 417 460 480 552 556 690 695 736 834 920 960 1,104 1,112 1,380 1,390 1,472 1,668 1,840 2,085 2,208 2,224 2,760 2,780 3,197 3,336 3,680 4,170 4,416 4,448 5,520 5,560 6,394 6,672 7,360 8,340 8,896 9,591 11,040 11,120 12,788 13,344 15,985 16,680 19,182 22,080 22,240 25,576 26,688 31,970 33,360 38,364 44,480 47,955 51,152 63,940 66,720 76,728 95,910 102,304 127,880 133,440 153,456 191,820 204,608 255,760 306,912 383,640 511,520 613,824 767,280 1,023,040 1,534,560 and 3,069,120, with no remainder.
Since 3,069,120 cannot be divided by just 1 and 3,069,120, it is not a prime number.