It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 42 019 674 is not a prime number.
For example, 42 019 674 can be divided by 2: 42 019 674 / 2 = 21 009 837.
For 42 019 674 to be a prime number, it would have been required that 42 019 674 has only two divisors, i.e., itself and 1.
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42 019 674 is an even number, because it is evenly divisible by 2: 42 019 674 / 2 = 21 009 837.
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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 42 019 674 is about 6 482.258.
Thus, the square root of 42 019 674 is not an integer, and therefore 42 019 674 is not a square number.
The square of a number (here 42 019 674) is the result of the product of this number (42 019 674) by itself (i.e., 42 019 674 × 42 019 674); the square of 42 019 674 is sometimes called "raising 42 019 674 to the power 2", or "42 019 674 squared".
The square of 42 019 674 is 1 765 653 003 066 276 because 42 019 674 × 42 019 674 = 42 019 6742 = 1 765 653 003 066 276.
As a consequence, 42 019 674 is the square root of 1 765 653 003 066 276.
42 019 674 is a number with 8 digits.
The multiples of 42 019 674 are all integers evenly divisible by 42 019 674, that is all numbers such that the remainder of the division by 42 019 674 is zero. There are infinitely many multiples of 42 019 674. The smallest multiples of 42 019 674 are: