Q: Is 421,458 a Prime Number?
A: No, 421,458 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 421458 can be evenly divided by 1 2 3 6 19 38 57 114 3,697 7,394 11,091 22,182 70,243 140,486 210,729 and 421,458, with no remainder.
Since 421,458 cannot be divided by just 1 and 421,458, it is not a prime number.