It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 42 016 242 is not a prime number.
For example, 42 016 242 can be divided by 2: 42 016 242 / 2 = 21 008 121.
For 42 016 242 to be a prime number, it would have been required that 42 016 242 has only two divisors, i.e., itself and 1.
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42 016 242 is an even number, because it is evenly divisible by 2: 42 016 242 / 2 = 21 008 121.
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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 42 016 242 is about 6 481.994.
Thus, the square root of 42 016 242 is not an integer, and therefore 42 016 242 is not a square number.
The square of a number (here 42 016 242) is the result of the product of this number (42 016 242) by itself (i.e., 42 016 242 × 42 016 242); the square of 42 016 242 is sometimes called "raising 42 016 242 to the power 2", or "42 016 242 squared".
The square of 42 016 242 is 1 765 364 591 802 564 because 42 016 242 × 42 016 242 = 42 016 2422 = 1 765 364 591 802 564.
As a consequence, 42 016 242 is the square root of 1 765 364 591 802 564.
42 016 242 is a number with 8 digits.
The multiples of 42 016 242 are all integers evenly divisible by 42 016 242, that is all numbers such that the remainder of the division by 42 016 242 is zero. There are infinitely many multiples of 42 016 242. The smallest multiples of 42 016 242 are: