Q: Is 406,423 a Prime Number?
A: Yes, 406,423 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 406423 can be evenly divided by 1 and 406,423, with no remainder.
Since 406,423 can be divided by just 1 and 406,423, it is a prime number.