Q: Is 521,920 a Prime Number?
A: No, 521,920 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 521920 can be evenly divided by 1 2 4 5 7 8 10 14 16 20 28 32 35 40 56 64 70 80 112 140 160 224 233 280 320 448 466 560 932 1,120 1,165 1,631 1,864 2,240 2,330 3,262 3,728 4,660 6,524 7,456 8,155 9,320 13,048 14,912 16,310 18,640 26,096 32,620 37,280 52,192 65,240 74,560 104,384 130,480 260,960 and 521,920, with no remainder.
Since 521,920 cannot be divided by just 1 and 521,920, it is not a prime number.