Q: Is 421,524 a Prime Number?
A: No, 421,524 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 421524 can be evenly divided by 1 2 3 4 6 9 12 18 27 36 54 81 108 162 324 1,301 2,602 3,903 5,204 7,806 11,709 15,612 23,418 35,127 46,836 70,254 105,381 140,508 210,762 and 421,524, with no remainder.
Since 421,524 cannot be divided by just 1 and 421,524, it is not a prime number.