Q: Is 405,667 a Prime Number?
A: Yes, 405,667 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 405667 can be evenly divided by 1 and 405,667, with no remainder.
Since 405,667 can be divided by just 1 and 405,667, it is a prime number.