5756561 has 4 divisors (see below), whose sum is σ = 5835492. Its totient is φ = 5677632.

The previous prime is 5756521. The next prime is 5756579. The reversal of 5756561 is 1656575.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2356225 + 3400336 = 1535^2 + 1844^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5756561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5756501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39356 + ... + 39501.

It is an arithmetic number, because the mean of its divisors is an integer number (1458873).

Almost surely, 2^5756561 is an apocalyptic number.

It is an amenable number.

5756561 is a deficient number, since it is larger than the sum of its proper divisors (78931).

5756561 is an equidigital number, since it uses as much as digits as its factorization.

5756561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78930.

The product of its digits is 31500, while the sum is 35.

The square root of 5756561 is about 2399.2834346946. The cubic root of 5756561 is about 179.2205078737.

The spelling of 5756561 in words is "five million, seven hundred fifty-six thousand, five hundred sixty-one".