It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 157 802 is not a prime number.
For example, 157 802 can be divided by 2: 157 802 / 2 = 78 901.
For 157 802 to be a prime number, it would have been required that 157 802 has only two divisors, i.e., itself and 1.
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157 802 is an even number, because it is evenly divisible by 2: 157 802 / 2 = 78 901.
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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 157 802 is about 397.243.
Thus, the square root of 157 802 is not an integer, and therefore 157 802 is not a square number.
The square of a number (here 157 802) is the result of the product of this number (157 802) by itself (i.e., 157 802 × 157 802); the square of 157 802 is sometimes called "raising 157 802 to the power 2", or "157 802 squared".
The square of 157 802 is 24 901 471 204 because 157 802 × 157 802 = 157 8022 = 24 901 471 204.
As a consequence, 157 802 is the square root of 24 901 471 204.
The multiples of 157 802 are all integers evenly divisible by 157 802, that is all numbers such that the remainder of the division by 157 802 is zero. There are infinitely many multiples of 157 802. The smallest multiples of 157 802 are: