Q: Is 521,120 a Prime Number?
A: No, 521,120 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 521120 can be evenly divided by 1 2 4 5 8 10 16 20 32 40 80 160 3,257 6,514 13,028 16,285 26,056 32,570 52,112 65,140 104,224 130,280 260,560 and 521,120, with no remainder.
Since 521,120 cannot be divided by just 1 and 521,120, it is not a prime number.