It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 123 745 742 is not a prime number.
For example, 123 745 742 can be divided by 2: 123 745 742 / 2 = 61 872 871.
For 123 745 742 to be a prime number, it would have been required that 123 745 742 has only two divisors, i.e., itself and 1.
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123 745 742 is an even number, because it is evenly divisible by 2: 123 745 742 / 2 = 61 872 871.
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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 123 745 742 is about 11 124.106.
Thus, the square root of 123 745 742 is not an integer, and therefore 123 745 742 is not a square number.
The square of a number (here 123 745 742) is the result of the product of this number (123 745 742) by itself (i.e., 123 745 742 × 123 745 742); the square of 123 745 742 is sometimes called "raising 123 745 742 to the power 2", or "123 745 742 squared".
The square of 123 745 742 is 15 313 008 663 130 564 because 123 745 742 × 123 745 742 = 123 745 7422 = 15 313 008 663 130 564.
As a consequence, 123 745 742 is the square root of 15 313 008 663 130 564.
123 745 742 is a number with 9 digits.
The multiples of 123 745 742 are all integers evenly divisible by 123 745 742, that is all numbers such that the remainder of the division by 123 745 742 is zero. There are infinitely many multiples of 123 745 742. The smallest multiples of 123 745 742 are: