2056861 has 8 divisors (see below), whose sum is σ = 2125440. Its totient is φ = 1989408.

The previous prime is 2056853. The next prime is 2056891. The reversal of 2056861 is 1686502.

It is the 586-th star number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2056861 - 2³ = 2056853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2056841) 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 7 ways as a sum of consecutive naturals, for example, 4825 + ... + 5233.

It is an arithmetic number, because the mean of its divisors is an integer number (265680).

2^2056861 is an apocalyptic number.

It is an amenable number.

2056861 is a deficient number, since it is larger than the sum of its proper divisors (68579).

2056861 is a wasteful number, since it uses less digits than its factorization.

2056861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 2056861 is about 1434.1760700834. The cubic root of 2056861 is about 127.1749711774.

The spelling of 2056861 in words is "two million, fifty-six thousand, eight hundred sixty-one".