Q: Is 261,604 a Prime Number?
A: No, 261,604 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 261604 can be evenly divided by 1 2 4 7 14 28 9,343 18,686 37,372 65,401 130,802 and 261,604, with no remainder.
Since 261,604 cannot be divided by just 1 and 261,604, it is not a prime number.