Q: Is 557,720 a Prime Number?
A: No, 557,720 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 557720 can be evenly divided by 1 2 4 5 8 10 20 40 73 146 191 292 365 382 584 730 764 955 1,460 1,528 1,910 2,920 3,820 7,640 13,943 27,886 55,772 69,715 111,544 139,430 278,860 and 557,720, with no remainder.
Since 557,720 cannot be divided by just 1 and 557,720, it is not a prime number.