Q: Is 261,564 a Prime Number?
A: No, 261,564 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 261564 can be evenly divided by 1 2 3 4 6 12 71 142 213 284 307 426 614 852 921 1,228 1,842 3,684 21,797 43,594 65,391 87,188 130,782 and 261,564, with no remainder.
Since 261,564 cannot be divided by just 1 and 261,564, it is not a prime number.