Q: Is 820,005 a Prime Number?

A: No, 820,005 is not a prime number.

Why is 820,005 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 820005 can be evenly divided by 1 3 5 15 54,667 164,001 273,335 and 820,005, with no remainder.

Since 820,005 cannot be divided by just 1 and 820,005, it is not a prime number.

Number	820,003	820,004	820,006	820,007
Prime?	no	no	no	no

All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).

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