It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 42 007 774 is not a prime number.
For example, 42 007 774 can be divided by 2: 42 007 774 / 2 = 21 003 887.
For 42 007 774 to be a prime number, it would have been required that 42 007 774 has only two divisors, i.e., itself and 1.
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42 007 774 is an even number, because it is evenly divisible by 2: 42 007 774 / 2 = 21 003 887.
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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 42 007 774 is about 6 481.340.
Thus, the square root of 42 007 774 is not an integer, and therefore 42 007 774 is not a square number.
The square of a number (here 42 007 774) is the result of the product of this number (42 007 774) by itself (i.e., 42 007 774 × 42 007 774); the square of 42 007 774 is sometimes called "raising 42 007 774 to the power 2", or "42 007 774 squared".
The square of 42 007 774 is 1 764 653 076 435 076 because 42 007 774 × 42 007 774 = 42 007 7742 = 1 764 653 076 435 076.
As a consequence, 42 007 774 is the square root of 1 764 653 076 435 076.
42 007 774 is a number with 8 digits.
The multiples of 42 007 774 are all integers evenly divisible by 42 007 774, that is all numbers such that the remainder of the division by 42 007 774 is zero. There are infinitely many multiples of 42 007 774. The smallest multiples of 42 007 774 are: