Q: Is 1,243,540 a Prime Number?
A: No, 1,243,540 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 1243540 can be evenly divided by 1 2 4 5 10 20 97 194 388 485 641 970 1,282 1,940 2,564 3,205 6,410 12,820 62,177 124,354 248,708 310,885 621,770 and 1,243,540, with no remainder.
Since 1,243,540 cannot be divided by just 1 and 1,243,540, it is not a prime number.