Q: Is 640,001 a Prime Number?
A: No, 640,001 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 640001 can be evenly divided by 1 29 761 841 22,069 and 640,001, with no remainder.
Since 640,001 cannot be divided by just 1 and 640,001, it is not a prime number.