Q: Is 840,280 a Prime Number?
A: No, 840,280 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 840280 can be evenly divided by 1 2 4 5 7 8 10 14 20 28 35 40 56 70 140 280 3,001 6,002 12,004 15,005 21,007 24,008 30,010 42,014 60,020 84,028 105,035 120,040 168,056 210,070 420,140 and 840,280, with no remainder.
Since 840,280 cannot be divided by just 1 and 840,280, it is not a prime number.