Q: Is 405,487 a Prime Number?
A: Yes, 405,487 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 405487 can be evenly divided by 1 and 405,487, with no remainder.
Since 405,487 can be divided by just 1 and 405,487, it is a prime number.