Is 545 a prime number? What are the divisors of 545?

## Parity of 545

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

Find out more:

## Is 545 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 545 is about 23.345.

Thus, the square root of 545 is not an integer, and therefore 545 is not a square number.

## What is the square number of 545?

The square of a number (here 545) is the result of the product of this number (545) by itself (i.e., 545 × 545); the square of 545 is sometimes called "raising 545 to the power 2", or "545 squared".

The square of 545 is 297 025 because 545 × 545 = 5452 = 297 025.

As a consequence, 545 is the square root of 297 025.

## Number of digits of 545

545 is a number with 3 digits.

## What are the multiples of 545?

The multiples of 545 are all integers evenly divisible by 545, that is all numbers such that the remainder of the division by 545 is zero. There are infinitely many multiples of 545. The smallest multiples of 545 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 545). 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 23.345). 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 545

• Preceding numbers: …543, 544
• Following numbers: 546, 547

### Nearest numbers from 545

• Preceding prime number: 541
• Following prime number: 547
Find out whether some integer is a prime number