Q: Is 5,321,920 a Prime Number?
A: No, 5,321,920 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 5321920 can be evenly divided by 1 2 4 5 8 10 16 20 32 40 64 80 160 320 16,631 33,262 66,524 83,155 133,048 166,310 266,096 332,620 532,192 665,240 1,064,384 1,330,480 2,660,960 and 5,321,920, with no remainder.
Since 5,321,920 cannot be divided by just 1 and 5,321,920, it is not a prime number.