Q: Is 161,720 a Prime Number?
A: No, 161,720 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 161720 can be evenly divided by 1 2 4 5 8 10 13 20 26 40 52 65 104 130 260 311 520 622 1,244 1,555 2,488 3,110 4,043 6,220 8,086 12,440 16,172 20,215 32,344 40,430 80,860 and 161,720, with no remainder.
Since 161,720 cannot be divided by just 1 and 161,720, it is not a prime number.