Q: Is 142,191 a Prime Number?
A: No, 142,191 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 142191 can be evenly divided by 1 3 7 9 21 37 61 63 111 183 259 333 427 549 777 1,281 2,257 2,331 3,843 6,771 15,799 20,313 47,397 and 142,191, with no remainder.
Since 142,191 cannot be divided by just 1 and 142,191, it is not a prime number.