Q: Is 261,563 a Prime Number?
A: Yes, 261,563 is a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 261563 can be evenly divided by 1 and 261,563, with no remainder.
Since 261,563 can be divided by just 1 and 261,563, it is a prime number.