Q: Is 642,225 a Prime Number?
A: No, 642,225 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 642225 can be evenly divided by 1 3 5 15 25 75 8,563 25,689 42,815 128,445 214,075 and 642,225, with no remainder.
Since 642,225 cannot be divided by just 1 and 642,225, it is not a prime number.