Q: Is 517,720 a Prime Number?
A: No, 517,720 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 517720 can be evenly divided by 1 2 4 5 7 8 10 14 20 28 35 40 43 56 70 86 140 172 215 280 301 344 430 602 860 1,204 1,505 1,720 1,849 2,408 3,010 3,698 6,020 7,396 9,245 12,040 12,943 14,792 18,490 25,886 36,980 51,772 64,715 73,960 103,544 129,430 258,860 and 517,720, with no remainder.
Since 517,720 cannot be divided by just 1 and 517,720, it is not a prime number.