Q: Is 1,216,428 a Prime Number?
A: No, 1,216,428 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 1216428 can be evenly divided by 1 2 3 4 6 12 167 334 501 607 668 1,002 1,214 1,821 2,004 2,428 3,642 7,284 101,369 202,738 304,107 405,476 608,214 and 1,216,428, with no remainder.
Since 1,216,428 cannot be divided by just 1 and 1,216,428, it is not a prime number.