It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 42 007 738 is not a prime number.
For example, 42 007 738 can be divided by 2: 42 007 738 / 2 = 21 003 869.
For 42 007 738 to be a prime number, it would have been required that 42 007 738 has only two divisors, i.e., itself and 1.
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42 007 738 is an even number, because it is evenly divisible by 2: 42 007 738 / 2 = 21 003 869.
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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 42 007 738 is about 6 481.338.
Thus, the square root of 42 007 738 is not an integer, and therefore 42 007 738 is not a square number.
The square of a number (here 42 007 738) is the result of the product of this number (42 007 738) by itself (i.e., 42 007 738 × 42 007 738); the square of 42 007 738 is sometimes called "raising 42 007 738 to the power 2", or "42 007 738 squared".
The square of 42 007 738 is 1 764 650 051 876 644 because 42 007 738 × 42 007 738 = 42 007 7382 = 1 764 650 051 876 644.
As a consequence, 42 007 738 is the square root of 1 764 650 051 876 644.
42 007 738 is a number with 8 digits.
The multiples of 42 007 738 are all integers evenly divisible by 42 007 738, that is all numbers such that the remainder of the division by 42 007 738 is zero. There are infinitely many multiples of 42 007 738. The smallest multiples of 42 007 738 are: