Q: Is 161,440 a Prime Number?
A: No, 161,440 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 161440 can be evenly divided by 1 2 4 5 8 10 16 20 32 40 80 160 1,009 2,018 4,036 5,045 8,072 10,090 16,144 20,180 32,288 40,360 80,720 and 161,440, with no remainder.
Since 161,440 cannot be divided by just 1 and 161,440, it is not a prime number.