It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 165 442 is not a prime number.
For example, 165 442 can be divided by 2: 165 442 / 2 = 82 721.
For 165 442 to be a prime number, it would have been required that 165 442 has only two divisors, i.e., itself and 1.
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165 442 is an even number, because it is evenly divisible by 2: 165 442 / 2 = 82 721.
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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 165 442 is about 406.746.
Thus, the square root of 165 442 is not an integer, and therefore 165 442 is not a square number.
The square of a number (here 165 442) is the result of the product of this number (165 442) by itself (i.e., 165 442 × 165 442); the square of 165 442 is sometimes called "raising 165 442 to the power 2", or "165 442 squared".
The square of 165 442 is 27 371 055 364 because 165 442 × 165 442 = 165 4422 = 27 371 055 364.
As a consequence, 165 442 is the square root of 27 371 055 364.
The multiples of 165 442 are all integers evenly divisible by 165 442, that is all numbers such that the remainder of the division by 165 442 is zero. There are infinitely many multiples of 165 442. The smallest multiples of 165 442 are: