It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 120 158 is not a prime number.
For example, 120 158 can be divided by 2: 120 158 / 2 = 60 079.
For 120 158 to be a prime number, it would have been required that 120 158 has only two divisors, i.e., itself and 1.
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120 158 is an even number, because it is evenly divisible by 2: 120 158 / 2 = 60 079.
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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 120 158 is about 346.638.
Thus, the square root of 120 158 is not an integer, and therefore 120 158 is not a square number.
The square of a number (here 120 158) is the result of the product of this number (120 158) by itself (i.e., 120 158 × 120 158); the square of 120 158 is sometimes called "raising 120 158 to the power 2", or "120 158 squared".
The square of 120 158 is 14 437 944 964 because 120 158 × 120 158 = 120 1582 = 14 437 944 964.
As a consequence, 120 158 is the square root of 14 437 944 964.
The multiples of 120 158 are all integers evenly divisible by 120 158, that is all numbers such that the remainder of the division by 120 158 is zero. There are infinitely many multiples of 120 158. The smallest multiples of 120 158 are: