Q: Is 209,920 a Prime Number?
A: No, 209,920 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 209920 can be evenly divided by 1 2 4 5 8 10 16 20 32 40 41 64 80 82 128 160 164 205 256 320 328 410 512 640 656 820 1,024 1,280 1,312 1,640 2,560 2,624 3,280 5,120 5,248 6,560 10,496 13,120 20,992 26,240 41,984 52,480 104,960 and 209,920, with no remainder.
Since 209,920 cannot be divided by just 1 and 209,920, it is not a prime number.