2056561 has 12 divisors (see below), whose sum is σ = 2286768. Its totient is φ = 1847664.

The previous prime is 2056553. The next prime is 2056573. The reversal of 2056561 is 1656502.

It is not a de Polignac number, because 2056561 - 2³ = 2056553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2056501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7126 + ... + 7408.

It is an arithmetic number, because the mean of its divisors is an integer number (190564).

2^2056561 is an apocalyptic number.

It is an amenable number.

2056561 is a deficient number, since it is larger than the sum of its proper divisors (230207).

2056561 is a wasteful number, since it uses less digits than its factorization.

2056561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 2056561 is about 1434.0714766008. The cubic root of 2056561 is about 127.1687879130.

The spelling of 2056561 in words is "two million, fifty-six thousand, five hundred sixty-one".