2056641 has 4 divisors (see below), whose sum is σ = 2742192. Its totient is φ = 1371092.

The previous prime is 2056631. The next prime is 2056661. The reversal of 2056641 is 1466502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2056641 - 2⁶ = 2056577 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2056631) 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, 342771 + ... + 342776.

It is an arithmetic number, because the mean of its divisors is an integer number (685548).

2^2056641 is an apocalyptic number.

It is an amenable number.

2056641 is a deficient number, since it is larger than the sum of its proper divisors (685551).

2056641 is an equidigital number, since it uses as much as digits as its factorization.

2056641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685550.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 2056641 is about 1434.0993689421. The cubic root of 2056641 is about 127.1704368423.

The spelling of 2056641 in words is "two million, fifty-six thousand, six hundred forty-one".