Q: Is 131,721 a Prime Number?
A: No, 131,721 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 131721 can be evenly divided by 1 3 23 69 83 249 529 1,587 1,909 5,727 43,907 and 131,721, with no remainder.
Since 131,721 cannot be divided by just 1 and 131,721, it is not a prime number.