Q: Is 171,621 a Prime Number?
A: No, 171,621 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 171621 can be evenly divided by 1 3 9 19,069 57,207 and 171,621, with no remainder.
Since 171,621 cannot be divided by just 1 and 171,621, it is not a prime number.