It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 165 241 is not a prime number.
For example, 165 241 can be divided by 149: 165 241 / 149 = 1 109.
For 165 241 to be a prime number, it would have been required that 165 241 has only two divisors, i.e., itself and 1.
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165 241 is an odd number, because it is not evenly divisible by 2.
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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 165 241 is about 406.498.
Thus, the square root of 165 241 is not an integer, and therefore 165 241 is not a square number.
The square of a number (here 165 241) is the result of the product of this number (165 241) by itself (i.e., 165 241 × 165 241); the square of 165 241 is sometimes called "raising 165 241 to the power 2", or "165 241 squared".
The square of 165 241 is 27 304 588 081 because 165 241 × 165 241 = 165 2412 = 27 304 588 081.
As a consequence, 165 241 is the square root of 27 304 588 081.
The multiples of 165 241 are all integers evenly divisible by 165 241, that is all numbers such that the remainder of the division by 165 241 is zero. There are infinitely many multiples of 165 241. The smallest multiples of 165 241 are: