Q: Is 642,100 a Prime Number?
A: No, 642,100 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 642100 can be evenly divided by 1 2 4 5 10 20 25 50 100 6,421 12,842 25,684 32,105 64,210 128,420 160,525 321,050 and 642,100, with no remainder.
Since 642,100 cannot be divided by just 1 and 642,100, it is not a prime number.