It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 42 625 138 is not a prime number.
For example, 42 625 138 can be divided by 2: 42 625 138 / 2 = 21 312 569.
For 42 625 138 to be a prime number, it would have been required that 42 625 138 has only two divisors, i.e., itself and 1.
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42 625 138 is an even number, because it is evenly divisible by 2: 42 625 138 / 2 = 21 312 569.
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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 42 625 138 is about 6 528.793.
Thus, the square root of 42 625 138 is not an integer, and therefore 42 625 138 is not a square number.
The square of a number (here 42 625 138) is the result of the product of this number (42 625 138) by itself (i.e., 42 625 138 × 42 625 138); the square of 42 625 138 is sometimes called "raising 42 625 138 to the power 2", or "42 625 138 squared".
The square of 42 625 138 is 1 816 902 389 519 044 because 42 625 138 × 42 625 138 = 42 625 1382 = 1 816 902 389 519 044.
As a consequence, 42 625 138 is the square root of 1 816 902 389 519 044.
42 625 138 is a number with 8 digits.
The multiples of 42 625 138 are all integers evenly divisible by 42 625 138, that is all numbers such that the remainder of the division by 42 625 138 is zero. There are infinitely many multiples of 42 625 138. The smallest multiples of 42 625 138 are: