Q: Is 1,607,421 a Prime Number?
A: No, 1,607,421 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 1607421 can be evenly divided by 1 3 137 411 3,911 11,733 535,807 and 1,607,421, with no remainder.
Since 1,607,421 cannot be divided by just 1 and 1,607,421, it is not a prime number.