Q: Is 858,820 a Prime Number?
A: No, 858,820 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 858820 can be evenly divided by 1 2 4 5 10 20 23 46 92 115 230 460 1,867 3,734 7,468 9,335 18,670 37,340 42,941 85,882 171,764 214,705 429,410 and 858,820, with no remainder.
Since 858,820 cannot be divided by just 1 and 858,820, it is not a prime number.