It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 135 429 is not a prime number.
For example, 135 429 can be divided by 3: 135 429 / 3 = 45 143.
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For 135 429 to be a prime number, it would have been required that 135 429 has only two divisors, i.e., itself and 1.
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135 429 is an odd number, because it is not evenly divisible by 2.
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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 135 429 is about 368.007.
Thus, the square root of 135 429 is not an integer, and therefore 135 429 is not a square number.
The square of a number (here 135 429) is the result of the product of this number (135 429) by itself (i.e., 135 429 × 135 429); the square of 135 429 is sometimes called "raising 135 429 to the power 2", or "135 429 squared".
The square of 135 429 is 18 341 014 041 because 135 429 × 135 429 = 135 4292 = 18 341 014 041.
As a consequence, 135 429 is the square root of 18 341 014 041.
The multiples of 135 429 are all integers evenly divisible by 135 429, that is all numbers such that the remainder of the division by 135 429 is zero. There are infinitely many multiples of 135 429. The smallest multiples of 135 429 are: