Is 1561 a prime number? What are the divisors of 1561?

## Parity of 1 561

1 561 is an odd number, because it is not evenly divisible by 2.

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## Is 1 561 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 1 561 is about 39.509.

Thus, the square root of 1 561 is not an integer, and therefore 1 561 is not a square number.

## What is the square number of 1 561?

The square of a number (here 1 561) is the result of the product of this number (1 561) by itself (i.e., 1 561 × 1 561); the square of 1 561 is sometimes called "raising 1 561 to the power 2", or "1 561 squared".

The square of 1 561 is 2 436 721 because 1 561 × 1 561 = 1 5612 = 2 436 721.

As a consequence, 1 561 is the square root of 2 436 721.

## Number of digits of 1 561

1 561 is a number with 4 digits.

## What are the multiples of 1 561?

The multiples of 1 561 are all integers evenly divisible by 1 561, that is all numbers such that the remainder of the division by 1 561 is zero. There are infinitely many multiples of 1 561. The smallest multiples of 1 561 are:

## Numbers near 1 561

### Nearest numbers from 1 561

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