Q: Is 720,545 a Prime Number?
A: No, 720,545 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 720545 can be evenly divided by 1 5 7 17 35 49 85 119 173 245 595 833 865 1,211 2,941 4,165 6,055 8,477 14,705 20,587 42,385 102,935 144,109 and 720,545, with no remainder.
Since 720,545 cannot be divided by just 1 and 720,545, it is not a prime number.