Q: Is 420,645 a Prime Number?
A: No, 420,645 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 420645 can be evenly divided by 1 3 5 15 29 87 145 435 967 2,901 4,835 14,505 28,043 84,129 140,215 and 420,645, with no remainder.
Since 420,645 cannot be divided by just 1 and 420,645, it is not a prime number.