Q: Is 1,558,820 a Prime Number?
A: No, 1,558,820 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 1558820 can be evenly divided by 1 2 4 5 10 20 41 82 164 205 410 820 1,901 3,802 7,604 9,505 19,010 38,020 77,941 155,882 311,764 389,705 779,410 and 1,558,820, with no remainder.
Since 1,558,820 cannot be divided by just 1 and 1,558,820, it is not a prime number.