Q: Is 6,687,421 a Prime Number?
A: No, 6,687,421 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 6687421 can be evenly divided by 1 13 514,417 and 6,687,421, with no remainder.
Since 6,687,421 cannot be divided by just 1 and 6,687,421, it is not a prime number.