Q: Is 1,321,623 a Prime Number?
A: No, 1,321,623 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 1321623 can be evenly divided by 1 3 9 27 31 93 279 837 1,579 4,737 14,211 42,633 48,949 146,847 440,541 and 1,321,623, with no remainder.
Since 1,321,623 cannot be divided by just 1 and 1,321,623, it is not a prime number.