Q: Is 1,231,540 a Prime Number?
A: No, 1,231,540 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 1231540 can be evenly divided by 1 2 4 5 10 20 139 278 443 556 695 886 1,390 1,772 2,215 2,780 4,430 8,860 61,577 123,154 246,308 307,885 615,770 and 1,231,540, with no remainder.
Since 1,231,540 cannot be divided by just 1 and 1,231,540, it is not a prime number.