Q: Is 421,902 a Prime Number?
A: No, 421,902 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 421902 can be evenly divided by 1 2 3 6 9 13 18 26 27 39 54 78 117 234 351 601 702 1,202 1,803 3,606 5,409 7,813 10,818 15,626 16,227 23,439 32,454 46,878 70,317 140,634 210,951 and 421,902, with no remainder.
Since 421,902 cannot be divided by just 1 and 421,902, it is not a prime number.