Q: Is 642,250 a Prime Number?
A: No, 642,250 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 642250 can be evenly divided by 1 2 5 7 10 14 25 35 50 70 125 175 250 350 367 734 875 1,750 1,835 2,569 3,670 5,138 9,175 12,845 18,350 25,690 45,875 64,225 91,750 128,450 321,125 and 642,250, with no remainder.
Since 642,250 cannot be divided by just 1 and 642,250, it is not a prime number.