Q: Is 511,640 a Prime Number?
A: No, 511,640 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 511640 can be evenly divided by 1 2 4 5 8 10 20 40 12,791 25,582 51,164 63,955 102,328 127,910 255,820 and 511,640, with no remainder.
Since 511,640 cannot be divided by just 1 and 511,640, it is not a prime number.