Q: Is 138,321 a Prime Number?
A: No, 138,321 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 138321 can be evenly divided by 1 3 9 27 47 109 141 327 423 981 1,269 2,943 5,123 15,369 46,107 and 138,321, with no remainder.
Since 138,321 cannot be divided by just 1 and 138,321, it is not a prime number.