Q: Is 261,987 a Prime Number?
A: No, 261,987 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 261987 can be evenly divided by 1 3 11 17 33 51 187 467 561 1,401 5,137 7,939 15,411 23,817 87,329 and 261,987, with no remainder.
Since 261,987 cannot be divided by just 1 and 261,987, it is not a prime number.