Q: Is 420,540 a Prime Number?
A: No, 420,540 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 420540 can be evenly divided by 1 2 3 4 5 6 10 12 15 20 30 43 60 86 129 163 172 215 258 326 430 489 516 645 652 815 860 978 1,290 1,630 1,956 2,445 2,580 3,260 4,890 7,009 9,780 14,018 21,027 28,036 35,045 42,054 70,090 84,108 105,135 140,180 210,270 and 420,540, with no remainder.
Since 420,540 cannot be divided by just 1 and 420,540, it is not a prime number.