It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 165 004 is not a prime number.
For example, 165 004 can be divided by 2: 165 004 / 2 = 82 502.
For 165 004 to be a prime number, it would have been required that 165 004 has only two divisors, i.e., itself and 1.
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165 004 is an even number, because it is evenly divisible by 2: 165 004 / 2 = 82 502.
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A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 165 004 is about 406.207.
Thus, the square root of 165 004 is not an integer, and therefore 165 004 is not a square number.
The square of a number (here 165 004) is the result of the product of this number (165 004) by itself (i.e., 165 004 × 165 004); the square of 165 004 is sometimes called "raising 165 004 to the power 2", or "165 004 squared".
The square of 165 004 is 27 226 320 016 because 165 004 × 165 004 = 165 0042 = 27 226 320 016.
As a consequence, 165 004 is the square root of 27 226 320 016.
The multiples of 165 004 are all integers evenly divisible by 165 004, that is all numbers such that the remainder of the division by 165 004 is zero. There are infinitely many multiples of 165 004. The smallest multiples of 165 004 are: