Q: Is 641,120 a Prime Number?
A: No, 641,120 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 641120 can be evenly divided by 1 2 4 5 8 10 16 20 32 40 80 160 4,007 8,014 16,028 20,035 32,056 40,070 64,112 80,140 128,224 160,280 320,560 and 641,120, with no remainder.
Since 641,120 cannot be divided by just 1 and 641,120, it is not a prime number.