Q: Is 561,920 a Prime Number?
A: No, 561,920 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 561920 can be evenly divided by 1 2 4 5 8 10 16 20 32 40 64 80 128 160 256 320 439 640 878 1,280 1,756 2,195 3,512 4,390 7,024 8,780 14,048 17,560 28,096 35,120 56,192 70,240 112,384 140,480 280,960 and 561,920, with no remainder.
Since 561,920 cannot be divided by just 1 and 561,920, it is not a prime number.