Q: Is 1,020,640 a Prime Number?
A: No, 1,020,640 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 1020640 can be evenly divided by 1 2 4 5 8 10 16 20 32 40 80 160 6,379 12,758 25,516 31,895 51,032 63,790 102,064 127,580 204,128 255,160 510,320 and 1,020,640, with no remainder.
Since 1,020,640 cannot be divided by just 1 and 1,020,640, it is not a prime number.