Q: Is 345,220 a Prime Number?
A: No, 345,220 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 345220 can be evenly divided by 1 2 4 5 10 20 41 82 164 205 410 421 820 842 1,684 2,105 4,210 8,420 17,261 34,522 69,044 86,305 172,610 and 345,220, with no remainder.
Since 345,220 cannot be divided by just 1 and 345,220, it is not a prime number.