A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4713120 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 27 30 32 36 40 45 48 54 60 72 80 90 96 108 120 135 144 160 180 216 240 270 288 360 432 480 540 720 864 1,080 1,091 1,440 2,160 2,182 3,273 4,320 4,364 5,455 6,546 8,728 9,819 10,910 13,092 16,365 17,456 19,638 21,820 26,184 29,457 32,730 34,912 39,276 43,640 49,095 52,368 58,914 65,460 78,552 87,280 98,190 104,736 117,828 130,920 147,285 157,104 174,560 196,380 235,656 261,840 294,570 314,208 392,760 471,312 523,680 589,140 785,520 942,624 1,178,280 1,571,040 2,356,560 and 4,713,120, with no remainder.
Since 4,713,120 cannot be divided by just 1 and 4,713,120, it is not a prime number.