Is 745 a prime number? What are the divisors of 745?

## Parity of 745

745 is an odd number, because it is not evenly divisible by 2.

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## Is 745 a perfect square number?

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 745 is about 27.295.

Thus, the square root of 745 is not an integer, and therefore 745 is not a square number.

## What is the square number of 745?

The square of a number (here 745) is the result of the product of this number (745) by itself (i.e., 745 × 745); the square of 745 is sometimes called "raising 745 to the power 2", or "745 squared".

The square of 745 is 555 025 because 745 × 745 = 7452 = 555 025.

As a consequence, 745 is the square root of 555 025.

## Number of digits of 745

745 is a number with 3 digits.

## What are the multiples of 745?

The multiples of 745 are all integers evenly divisible by 745, that is all numbers such that the remainder of the division by 745 is zero. There are infinitely many multiples of 745. The smallest multiples of 745 are:

## How to determine whether an integer is a prime number?

To determine the primality of a number, several algorithms can be used. The most naive technique is to test all divisors strictly smaller to the number of which we want to determine the primality (here 745). First, we can eliminate all even numbers greater than 2 (and hence 4, 6, 8…). Then, we can stop this check when we reach the square root of the number of which we want to determine the primality (here the square root is about 27.295). Historically, the sieve of Eratosthenes (dating from the Greek mathematics) implements this technique in a relatively efficient manner.

More modern techniques include the sieve of Atkin, probabilistic algorithms, and the cyclotomic AKS test.

## Numbers near 745

• Preceding numbers: …743, 744
• Following numbers: 746, 747

### Nearest numbers from 745

• Preceding prime number: 743
• Following prime number: 751
Find out whether some integer is a prime number