Q: Is 420,140 a Prime Number?
A: No, 420,140 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 420140 can be evenly divided by 1 2 4 5 7 10 14 20 28 35 70 140 3,001 6,002 12,004 15,005 21,007 30,010 42,014 60,020 84,028 105,035 210,070 and 420,140, with no remainder.
Since 420,140 cannot be divided by just 1 and 420,140, it is not a prime number.