Q: Is 243,005 a Prime Number?
A: No, 243,005 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 243005 can be evenly divided by 1 5 7 35 53 131 265 371 655 917 1,855 4,585 6,943 34,715 48,601 and 243,005, with no remainder.
Since 243,005 cannot be divided by just 1 and 243,005, it is not a prime number.