Q: Is 640,267 a Prime Number?
A: Yes, 640,267 is a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 640267 can be evenly divided by 1 and 640,267, with no remainder.
Since 640,267 can be divided by just 1 and 640,267, it is a prime number.