Q: Is 641,264 a Prime Number?
A: No, 641,264 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 641264 can be evenly divided by 1 2 4 8 13 16 26 52 104 208 3,083 6,166 12,332 24,664 40,079 49,328 80,158 160,316 320,632 and 641,264, with no remainder.
Since 641,264 cannot be divided by just 1 and 641,264, it is not a prime number.