Q: Is 421,408 a Prime Number?

 A: No, 421,408 is not a prime number.

Why is 421,408 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 421408 can be evenly divided by 1 2 4 8 13 16 26 32 52 104 208 416 1,013 2,026 4,052 8,104 13,169 16,208 26,338 32,416 52,676 105,352 210,704 and 421,408, with no remainder.

Since 421,408 cannot be divided by just 1 and 421,408, it is not a prime number.


More Examples

Number 421,406421,407421,409421,410
Prime? nonoyesno
  • All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).

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