Q: Is 243,640 a Prime Number?
A: No, 243,640 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 243640 can be evenly divided by 1 2 4 5 8 10 20 40 6,091 12,182 24,364 30,455 48,728 60,910 121,820 and 243,640, with no remainder.
Since 243,640 cannot be divided by just 1 and 243,640, it is not a prime number.