Q: Is 7,123,420 a Prime Number?
A: No, 7,123,420 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 7123420 can be evenly divided by 1 2 4 5 10 20 356,171 712,342 1,424,684 1,780,855 3,561,710 and 7,123,420, with no remainder.
Since 7,123,420 cannot be divided by just 1 and 7,123,420, it is not a prime number.