Q: Is 420,851 a Prime Number?
A: Yes, 420,851 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 420851 can be evenly divided by 1 and 420,851, with no remainder.
Since 420,851 can be divided by just 1 and 420,851, it is a prime number.