Q: Is 187,561 a Prime Number?
A: No, 187,561 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 187561 can be evenly divided by 1 11 17 59 187 289 649 1,003 3,179 11,033 17,051 and 187,561, with no remainder.
Since 187,561 cannot be divided by just 1 and 187,561, it is not a prime number.