Q: Is 1,428,225 a Prime Number?
A: No, 1,428,225 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 1428225 can be evenly divided by 1 3 5 15 25 75 137 139 411 417 685 695 2,055 2,085 3,425 3,475 10,275 10,425 19,043 57,129 95,215 285,645 476,075 and 1,428,225, with no remainder.
Since 1,428,225 cannot be divided by just 1 and 1,428,225, it is not a prime number.