Q: Is 421,428 a Prime Number?
A: No, 421,428 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 421428 can be evenly divided by 1 2 3 4 6 7 12 14 21 28 29 42 58 84 87 116 173 174 203 346 348 406 519 609 692 812 1,038 1,211 1,218 2,076 2,422 2,436 3,633 4,844 5,017 7,266 10,034 14,532 15,051 20,068 30,102 35,119 60,204 70,238 105,357 140,476 210,714 and 421,428, with no remainder.
Since 421,428 cannot be divided by just 1 and 421,428, it is not a prime number.