Q: Is 720,005 a Prime Number?
A: No, 720,005 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 720005 can be evenly divided by 1 5 11 13 19 53 55 65 95 143 209 247 265 583 689 715 1,007 1,045 1,235 2,717 2,915 3,445 5,035 7,579 11,077 13,091 13,585 37,895 55,385 65,455 144,001 and 720,005, with no remainder.
Since 720,005 cannot be divided by just 1 and 720,005, it is not a prime number.