Q: Is 402,511 a Prime Number?
A: Yes, 402,511 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 402511 can be evenly divided by 1 and 402,511, with no remainder.
Since 402,511 can be divided by just 1 and 402,511, it is a prime number.