Q: Is 211,428 a Prime Number?
A: No, 211,428 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 211428 can be evenly divided by 1 2 3 4 6 7 9 12 14 18 21 28 36 42 63 84 126 252 839 1,678 2,517 3,356 5,034 5,873 7,551 10,068 11,746 15,102 17,619 23,492 30,204 35,238 52,857 70,476 105,714 and 211,428, with no remainder.
Since 211,428 cannot be divided by just 1 and 211,428, it is not a prime number.