It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 162 642 is not a prime number.
For example, 162 642 can be divided by 2: 162 642 / 2 = 81 321.
For 162 642 to be a prime number, it would have been required that 162 642 has only two divisors, i.e., itself and 1.
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162 642 is an even number, because it is evenly divisible by 2: 162 642 / 2 = 81 321.
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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 162 642 is about 403.289.
Thus, the square root of 162 642 is not an integer, and therefore 162 642 is not a square number.
The square of a number (here 162 642) is the result of the product of this number (162 642) by itself (i.e., 162 642 × 162 642); the square of 162 642 is sometimes called "raising 162 642 to the power 2", or "162 642 squared".
The square of 162 642 is 26 452 420 164 because 162 642 × 162 642 = 162 6422 = 26 452 420 164.
As a consequence, 162 642 is the square root of 26 452 420 164.
The multiples of 162 642 are all integers evenly divisible by 162 642, that is all numbers such that the remainder of the division by 162 642 is zero. There are infinitely many multiples of 162 642. The smallest multiples of 162 642 are: