Q: Is 423,540 a Prime Number?
A: No, 423,540 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 423540 can be evenly divided by 1 2 3 4 5 6 9 10 12 13 15 18 20 26 30 36 39 45 52 60 65 78 90 117 130 156 180 181 195 234 260 362 390 468 543 585 724 780 905 1,086 1,170 1,629 1,810 2,172 2,340 2,353 2,715 3,258 3,620 4,706 5,430 6,516 7,059 8,145 9,412 10,860 11,765 14,118 16,290 21,177 23,530 28,236 32,580 35,295 42,354 47,060 70,590 84,708 105,885 141,180 211,770 and 423,540, with no remainder.
Since 423,540 cannot be divided by just 1 and 423,540, it is not a prime number.