It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 42 138 102 is not a prime number.
For example, 42 138 102 can be divided by 2: 42 138 102 / 2 = 21 069 051.
For 42 138 102 to be a prime number, it would have been required that 42 138 102 has only two divisors, i.e., itself and 1.
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42 138 102 is an even number, because it is evenly divisible by 2: 42 138 102 / 2 = 21 069 051.
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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 42 138 102 is about 6 491.387.
Thus, the square root of 42 138 102 is not an integer, and therefore 42 138 102 is not a square number.
The square of a number (here 42 138 102) is the result of the product of this number (42 138 102) by itself (i.e., 42 138 102 × 42 138 102); the square of 42 138 102 is sometimes called "raising 42 138 102 to the power 2", or "42 138 102 squared".
The square of 42 138 102 is 1 775 619 640 162 404 because 42 138 102 × 42 138 102 = 42 138 1022 = 1 775 619 640 162 404.
As a consequence, 42 138 102 is the square root of 1 775 619 640 162 404.
42 138 102 is a number with 8 digits.
The multiples of 42 138 102 are all integers evenly divisible by 42 138 102, that is all numbers such that the remainder of the division by 42 138 102 is zero. There are infinitely many multiples of 42 138 102. The smallest multiples of 42 138 102 are: