2056855 has 4 divisors (see below), whose sum is σ = 2468232. Its totient is φ = 1645480.

The previous prime is 2056853. The next prime is 2056891. The reversal of 2056855 is 5586502.

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

It is not a de Polignac number, because 2056855 - 2¹ = 2056853 is a prime.

It is a Duffinian number.

2056855 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2056853) 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, 205681 + ... + 205690.

It is an arithmetic number, because the mean of its divisors is an integer number (617058).

2^2056855 is an apocalyptic number.

2056855 is a deficient number, since it is larger than the sum of its proper divisors (411377).

2056855 is an equidigital number, since it uses as much as digits as its factorization.

2056855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411376.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 2056855 is about 1434.1739782885. The cubic root of 2056855 is about 127.1748475180.

The spelling of 2056855 in words is "two million, fifty-six thousand, eight hundred fifty-five".