Q: Is 266,821 a Prime Number?
A: Yes, 266,821 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 266821 can be evenly divided by 1 and 266,821, with no remainder.
Since 266,821 can be divided by just 1 and 266,821, it is a prime number.