Q: Is 261,680 a Prime Number?
A: No, 261,680 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 261680 can be evenly divided by 1 2 4 5 8 10 16 20 40 80 3,271 6,542 13,084 16,355 26,168 32,710 52,336 65,420 130,840 and 261,680, with no remainder.
Since 261,680 cannot be divided by just 1 and 261,680, it is not a prime number.