It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 42 016 009 is not a prime number.
For example, 42 016 009 can be divided by 7: 42 016 009 / 7 = 6 002 287.
For 42 016 009 to be a prime number, it would have been required that 42 016 009 has only two divisors, i.e., itself and 1.
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42 016 009 is an odd number, because it is not evenly divisible by 2.
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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 42 016 009 is about 6 481.976.
Thus, the square root of 42 016 009 is not an integer, and therefore 42 016 009 is not a square number.
The square of a number (here 42 016 009) is the result of the product of this number (42 016 009) by itself (i.e., 42 016 009 × 42 016 009); the square of 42 016 009 is sometimes called "raising 42 016 009 to the power 2", or "42 016 009 squared".
The square of 42 016 009 is 1 765 345 012 288 081 because 42 016 009 × 42 016 009 = 42 016 0092 = 1 765 345 012 288 081.
As a consequence, 42 016 009 is the square root of 1 765 345 012 288 081.
42 016 009 is a number with 8 digits.
The multiples of 42 016 009 are all integers evenly divisible by 42 016 009, that is all numbers such that the remainder of the division by 42 016 009 is zero. There are infinitely many multiples of 42 016 009. The smallest multiples of 42 016 009 are: