It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 642 014 274 is not a prime number.
For example, 642 014 274 can be divided by 2: 642 014 274 / 2 = 321 007 137.
For 642 014 274 to be a prime number, it would have been required that 642 014 274 has only two divisors, i.e., itself and 1.
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642 014 274 is an even number, because it is evenly divisible by 2: 642 014 274 / 2 = 321 007 137.
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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 642 014 274 is about 25 338.001.
Thus, the square root of 642 014 274 is not an integer, and therefore 642 014 274 is not a square number.
The square of a number (here 642 014 274) is the result of the product of this number (642 014 274) by itself (i.e., 642 014 274 × 642 014 274); the square of 642 014 274 is sometimes called "raising 642 014 274 to the power 2", or "642 014 274 squared".
The square of 642 014 274 is 412 182 328 019 747 072 because 642 014 274 × 642 014 274 = 642 014 2742 = 412 182 328 019 747 072.
As a consequence, 642 014 274 is the square root of 412 182 328 019 747 072.
642 014 274 is a number with 9 digits.
The multiples of 642 014 274 are all integers evenly divisible by 642 014 274, that is all numbers such that the remainder of the division by 642 014 274 is zero. There are infinitely many multiples of 642 014 274. The smallest multiples of 642 014 274 are: