Q: Is 423,780 a Prime Number?
A: No, 423,780 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 423780 can be evenly divided by 1 2 3 4 5 6 7 10 12 14 15 20 21 28 30 35 42 60 70 84 105 140 210 420 1,009 2,018 3,027 4,036 5,045 6,054 7,063 10,090 12,108 14,126 15,135 20,180 21,189 28,252 30,270 35,315 42,378 60,540 70,630 84,756 105,945 141,260 211,890 and 423,780, with no remainder.
Since 423,780 cannot be divided by just 1 and 423,780, it is not a prime number.