Q: Is 1,421,607 a Prime Number?
A: No, 1,421,607 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 1421607 can be evenly divided by 1 3 11 23 33 69 253 759 1,873 5,619 20,603 43,079 61,809 129,237 473,869 and 1,421,607, with no remainder.
Since 1,421,607 cannot be divided by just 1 and 1,421,607, it is not a prime number.