Q: Is 21,042,100 a Prime Number?

 A: No, 21,042,100 is not a prime number.

Why is 21,042,100 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 21042100 can be evenly divided by 1 2 4 5 10 20 25 50 100 210,421 420,842 841,684 1,052,105 2,104,210 4,208,420 5,260,525 10,521,050 and 21,042,100, with no remainder.

Since 21,042,100 cannot be divided by just 1 and 21,042,100, it is not a prime number.


More Examples

Number 21,042,09821,042,09921,042,10121,042,102
Prime? nononono
  • All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).

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