Q: Is 256,424 a Prime Number?
A: No, 256,424 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 256424 can be evenly divided by 1 2 4 7 8 14 19 28 38 56 76 133 152 241 266 482 532 964 1,064 1,687 1,928 3,374 4,579 6,748 9,158 13,496 18,316 32,053 36,632 64,106 128,212 and 256,424, with no remainder.
Since 256,424 cannot be divided by just 1 and 256,424, it is not a prime number.