Q: Is 161,604 a Prime Number?
A: No, 161,604 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 161604 can be evenly divided by 1 2 3 4 6 9 12 18 36 67 134 201 268 402 603 804 1,206 2,412 4,489 8,978 13,467 17,956 26,934 40,401 53,868 80,802 and 161,604, with no remainder.
Since 161,604 cannot be divided by just 1 and 161,604, it is not a prime number.