Q: Is 81,421 a Prime Number?
A: Yes, 81,421 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 81421 can be evenly divided by 1 and 81,421, with no remainder.
Since 81,421 can be divided by just 1 and 81,421, it is a prime number.