It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 158 602 is not a prime number.
For example, 158 602 can be divided by 2: 158 602 / 2 = 79 301.
For 158 602 to be a prime number, it would have been required that 158 602 has only two divisors, i.e., itself and 1.
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158 602 is an even number, because it is evenly divisible by 2: 158 602 / 2 = 79 301.
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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 158 602 is about 398.249.
Thus, the square root of 158 602 is not an integer, and therefore 158 602 is not a square number.
The square of a number (here 158 602) is the result of the product of this number (158 602) by itself (i.e., 158 602 × 158 602); the square of 158 602 is sometimes called "raising 158 602 to the power 2", or "158 602 squared".
The square of 158 602 is 25 154 594 404 because 158 602 × 158 602 = 158 6022 = 25 154 594 404.
As a consequence, 158 602 is the square root of 25 154 594 404.
The multiples of 158 602 are all integers evenly divisible by 158 602, that is all numbers such that the remainder of the division by 158 602 is zero. There are infinitely many multiples of 158 602. The smallest multiples of 158 602 are: