Q: Is 1,421,320 a Prime Number?
A: No, 1,421,320 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 1421320 can be evenly divided by 1 2 4 5 8 10 20 40 35,533 71,066 142,132 177,665 284,264 355,330 710,660 and 1,421,320, with no remainder.
Since 1,421,320 cannot be divided by just 1 and 1,421,320, it is not a prime number.