Q: Is 521,280 a Prime Number?
A: No, 521,280 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 521280 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 30 32 36 40 45 48 60 64 72 80 90 96 120 144 160 180 181 192 240 288 320 360 362 480 543 576 720 724 905 960 1,086 1,440 1,448 1,629 1,810 2,172 2,715 2,880 2,896 3,258 3,620 4,344 5,430 5,792 6,516 7,240 8,145 8,688 10,860 11,584 13,032 14,480 16,290 17,376 21,720 26,064 28,960 32,580 34,752 43,440 52,128 57,920 65,160 86,880 104,256 130,320 173,760 260,640 and 521,280, with no remainder.
Since 521,280 cannot be divided by just 1 and 521,280, it is not a prime number.