It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 100 742 is not a prime number.
For example, 100 742 can be divided by 2: 100 742 / 2 = 50 371.
For 100 742 to be a prime number, it would have been required that 100 742 has only two divisors, i.e., itself and 1.
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100 742 is an even number, because it is evenly divisible by 2: 100 742 / 2 = 50 371.
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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 100 742 is about 317.399.
Thus, the square root of 100 742 is not an integer, and therefore 100 742 is not a square number.
The square of a number (here 100 742) is the result of the product of this number (100 742) by itself (i.e., 100 742 × 100 742); the square of 100 742 is sometimes called "raising 100 742 to the power 2", or "100 742 squared".
The square of 100 742 is 10 148 950 564 because 100 742 × 100 742 = 100 7422 = 10 148 950 564.
As a consequence, 100 742 is the square root of 10 148 950 564.
The multiples of 100 742 are all integers evenly divisible by 100 742, that is all numbers such that the remainder of the division by 100 742 is zero. There are infinitely many multiples of 100 742. The smallest multiples of 100 742 are: