It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 130 521 is not a prime number.
For example, 130 521 can be divided by 3: 130 521 / 3 = 43 507.
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For 130 521 to be a prime number, it would have been required that 130 521 has only two divisors, i.e., itself and 1.
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130 521 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 130 521 is about 361.277.
Thus, the square root of 130 521 is not an integer, and therefore 130 521 is not a square number.
The square of a number (here 130 521) is the result of the product of this number (130 521) by itself (i.e., 130 521 × 130 521); the square of 130 521 is sometimes called "raising 130 521 to the power 2", or "130 521 squared".
The square of 130 521 is 17 035 731 441 because 130 521 × 130 521 = 130 5212 = 17 035 731 441.
As a consequence, 130 521 is the square root of 17 035 731 441.
The multiples of 130 521 are all integers evenly divisible by 130 521, that is all numbers such that the remainder of the division by 130 521 is zero. There are infinitely many multiples of 130 521. The smallest multiples of 130 521 are: