Q: Is 1,320,921 a Prime Number?
A: No, 1,320,921 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 1320921 can be evenly divided by 1 3 7 9 21 27 29 63 87 189 203 241 261 609 723 783 1,687 1,827 2,169 5,061 5,481 6,507 6,989 15,183 20,967 45,549 48,923 62,901 146,769 188,703 440,307 and 1,320,921, with no remainder.
Since 1,320,921 cannot be divided by just 1 and 1,320,921, it is not a prime number.