Q: Is 1,621,437 a Prime Number?
A: No, 1,621,437 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 1621437 can be evenly divided by 1 3 113 339 4,783 14,349 540,479 and 1,621,437, with no remainder.
Since 1,621,437 cannot be divided by just 1 and 1,621,437, it is not a prime number.