Q: Is 1,538,421 a Prime Number?
A: No, 1,538,421 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 1538421 can be evenly divided by 1 3 29 87 17,683 53,049 512,807 and 1,538,421, with no remainder.
Since 1,538,421 cannot be divided by just 1 and 1,538,421, it is not a prime number.