2575561 has 4 divisors (see below), whose sum is σ = 2599300. Its totient is φ = 2551824.

The previous prime is 2575549. The next prime is 2575589. The reversal of 2575561 is 1655752.

2575561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 712336 + 1863225 = 844^2 + 1365^2 .

It is a cyclic number.

It is not a de Polignac number, because 2575561 - 2⁹ = 2575049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2575061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11706 + ... + 11923.

It is an arithmetic number, because the mean of its divisors is an integer number (649825).

2^2575561 is an apocalyptic number.

It is an amenable number.

2575561 is a deficient number, since it is larger than the sum of its proper divisors (23739).

2575561 is a wasteful number, since it uses less digits than its factorization.

2575561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23738.

The product of its digits is 10500, while the sum is 31.

The square root of 2575561 is about 1604.8554452037. The cubic root of 2575561 is about 137.0746924296.

It can be divided in two parts, 2575 and 561, that added together give a square (3136 = 56²).

The spelling of 2575561 in words is "two million, five hundred seventy-five thousand, five hundred sixty-one".