Q: Is 21,001,409 a Prime Number?

 A: No, 21,001,409 is not a prime number.

Why is 21,001,409 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 21001409 can be evenly divided by 1 11 13 17 53 143 163 187 221 583 689 901 1,793 2,119 2,431 2,771 7,579 8,639 9,911 11,713 23,309 30,481 36,023 95,029 112,307 128,843 146,863 396,253 1,235,377 1,615,493 1,909,219 and 21,001,409, with no remainder.

Since 21,001,409 cannot be divided by just 1 and 21,001,409, it is not a prime number.


More Examples

Number 21,001,40721,001,40821,001,41021,001,411
Prime? nononoyes
  • All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).

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