Q: Is 12,640 a Prime Number?
A: No, 12,640 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 12640 can be evenly divided by 1 2 4 5 8 10 16 20 32 40 79 80 158 160 316 395 632 790 1,264 1,580 2,528 3,160 6,320 and 12,640, with no remainder.
Since 12,640 cannot be divided by just 1 and 12,640, it is not a prime number.