Q: Is 42,390 a Prime Number?
A: No, 42,390 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 42390 can be evenly divided by 1 2 3 5 6 9 10 15 18 27 30 45 54 90 135 157 270 314 471 785 942 1,413 1,570 2,355 2,826 4,239 4,710 7,065 8,478 14,130 21,195 and 42,390, with no remainder.
Since 42,390 cannot be divided by just 1 and 42,390, it is not a prime number.