Q: Is 520,840 a Prime Number?
A: No, 520,840 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 520840 can be evenly divided by 1 2 4 5 8 10 20 29 40 58 116 145 232 290 449 580 898 1,160 1,796 2,245 3,592 4,490 8,980 13,021 17,960 26,042 52,084 65,105 104,168 130,210 260,420 and 520,840, with no remainder.
Since 520,840 cannot be divided by just 1 and 520,840, it is not a prime number.