It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 150 742 is not a prime number.
For example, 150 742 can be divided by 2: 150 742 / 2 = 75 371.
For 150 742 to be a prime number, it would have been required that 150 742 has only two divisors, i.e., itself and 1.
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150 742 is an even number, because it is evenly divisible by 2: 150 742 / 2 = 75 371.
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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 150 742 is about 388.255.
Thus, the square root of 150 742 is not an integer, and therefore 150 742 is not a square number.
The square of a number (here 150 742) is the result of the product of this number (150 742) by itself (i.e., 150 742 × 150 742); the square of 150 742 is sometimes called "raising 150 742 to the power 2", or "150 742 squared".
The square of 150 742 is 22 723 150 564 because 150 742 × 150 742 = 150 7422 = 22 723 150 564.
As a consequence, 150 742 is the square root of 22 723 150 564.
The multiples of 150 742 are all integers evenly divisible by 150 742, that is all numbers such that the remainder of the division by 150 742 is zero. There are infinitely many multiples of 150 742. The smallest multiples of 150 742 are: