Q: Is 1,228,420 a Prime Number?
A: No, 1,228,420 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 1228420 can be evenly divided by 1 2 4 5 10 17 20 34 68 85 170 340 3,613 7,226 14,452 18,065 36,130 61,421 72,260 122,842 245,684 307,105 614,210 and 1,228,420, with no remainder.
Since 1,228,420 cannot be divided by just 1 and 1,228,420, it is not a prime number.