Q: Is 421,828 a Prime Number?
A: No, 421,828 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 421828 can be evenly divided by 1 2 4 11 22 44 9,587 19,174 38,348 105,457 210,914 and 421,828, with no remainder.
Since 421,828 cannot be divided by just 1 and 421,828, it is not a prime number.