A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4462560 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 1,033 1,080 1,440 2,066 2,160 3,099 4,132 4,320 5,165 6,198 8,264 9,297 10,330 12,396 15,495 16,528 18,594 20,660 24,792 27,891 30,990 33,056 37,188 41,320 46,485 49,584 55,782 61,980 74,376 82,640 92,970 99,168 111,564 123,960 139,455 148,752 165,280 185,940 223,128 247,920 278,910 297,504 371,880 446,256 495,840 557,820 743,760 892,512 1,115,640 1,487,520 2,231,280 and 4,462,560, with no remainder.
Since 4,462,560 cannot be divided by just 1 and 4,462,560, it is not a prime number.