Q: Is 4,243,221 a Prime Number?
A: No, 4,243,221 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 4243221 can be evenly divided by 1 3 9 59 61 131 177 183 393 531 549 1,179 3,599 7,729 7,991 10,797 23,187 23,973 32,391 69,561 71,919 471,469 1,414,407 and 4,243,221, with no remainder.
Since 4,243,221 cannot be divided by just 1 and 4,243,221, it is not a prime number.