It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 135 488 is not a prime number.
For example, 135 488 can be divided by 2: 135 488 / 2 = 67 744.
For 135 488 to be a prime number, it would have been required that 135 488 has only two divisors, i.e., itself and 1.
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135 488 is an even number, because it is evenly divisible by 2: 135 488 / 2 = 67 744.
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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 135 488 is about 368.087.
Thus, the square root of 135 488 is not an integer, and therefore 135 488 is not a square number.
The square of a number (here 135 488) is the result of the product of this number (135 488) by itself (i.e., 135 488 × 135 488); the square of 135 488 is sometimes called "raising 135 488 to the power 2", or "135 488 squared".
The square of 135 488 is 18 356 998 144 because 135 488 × 135 488 = 135 4882 = 18 356 998 144.
As a consequence, 135 488 is the square root of 18 356 998 144.
The multiples of 135 488 are all integers evenly divisible by 135 488, that is all numbers such that the remainder of the division by 135 488 is zero. There are infinitely many multiples of 135 488. The smallest multiples of 135 488 are: