Q: Is 345,555 a Prime Number?
A: No, 345,555 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 345555 can be evenly divided by 1 3 5 7 9 15 21 35 45 63 105 315 1,097 3,291 5,485 7,679 9,873 16,455 23,037 38,395 49,365 69,111 115,185 and 345,555, with no remainder.
Since 345,555 cannot be divided by just 1 and 345,555, it is not a prime number.