It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 145 164 is not a prime number.
For example, 145 164 can be divided by 2: 145 164 / 2 = 72 582.
For 145 164 to be a prime number, it would have been required that 145 164 has only two divisors, i.e., itself and 1.
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145 164 is an even number, because it is evenly divisible by 2: 145 164 / 2 = 72 582.
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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 145 164 is about 381.004.
Thus, the square root of 145 164 is not an integer, and therefore 145 164 is not a square number.
The square of a number (here 145 164) is the result of the product of this number (145 164) by itself (i.e., 145 164 × 145 164); the square of 145 164 is sometimes called "raising 145 164 to the power 2", or "145 164 squared".
The square of 145 164 is 21 072 586 896 because 145 164 × 145 164 = 145 1642 = 21 072 586 896.
As a consequence, 145 164 is the square root of 21 072 586 896.
The multiples of 145 164 are all integers evenly divisible by 145 164, that is all numbers such that the remainder of the division by 145 164 is zero. There are infinitely many multiples of 145 164. The smallest multiples of 145 164 are: