Q: Is 155,961 a Prime Number?
A: No, 155,961 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 155961 can be evenly divided by 1 3 9 13 31 39 43 93 117 129 279 387 403 559 1,209 1,333 1,677 3,627 3,999 5,031 11,997 17,329 51,987 and 155,961, with no remainder.
Since 155,961 cannot be divided by just 1 and 155,961, it is not a prime number.