Q: Is 386,421 a Prime Number?
A: No, 386,421 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 386421 can be evenly divided by 1 3 7 21 18,401 55,203 128,807 and 386,421, with no remainder.
Since 386,421 cannot be divided by just 1 and 386,421, it is not a prime number.