Q: Is 421,861 a Prime Number?
A: No, 421,861 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 421861 can be evenly divided by 1 11 38,351 and 421,861, with no remainder.
Since 421,861 cannot be divided by just 1 and 421,861, it is not a prime number.