Q: Is 256,608 a Prime Number?
A: No, 256,608 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 256608 can be evenly divided by 1 2 3 4 6 8 9 11 12 16 18 22 24 27 32 33 36 44 48 54 66 72 81 88 96 99 108 132 144 162 176 198 216 243 264 288 297 324 352 396 432 486 528 594 648 729 792 864 891 972 1,056 1,188 1,296 1,458 1,584 1,782 1,944 2,376 2,592 2,673 2,916 3,168 3,564 3,888 4,752 5,346 5,832 7,128 7,776 8,019 9,504 10,692 11,664 14,256 16,038 21,384 23,328 28,512 32,076 42,768 64,152 85,536 128,304 and 256,608, with no remainder.
Since 256,608 cannot be divided by just 1 and 256,608, it is not a prime number.