2021056 has 28 divisors (see below), whose sum is σ = 4187952. Its totient is φ = 965888.

The previous prime is 2021053. The next prime is 2021077. The reversal of 2021056 is 6501202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a pancake number, because a pancake can be divided into 2021056 parts by 2010 straight cuts.

It is a plaindrome in base 13.

It is a nialpdrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021053) 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, 786 + ... + 2158.

2^2021056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2093976).

2021056 is an abundant number, since it is smaller than the sum of its proper divisors (2166896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2021056 is a wasteful number, since it uses less digits than its factorization.

2021056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1408 (or 1398 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 2021056 is about 1421.6384913191. The cubic root of 2021056 is about 126.4327106497.

Adding to 2021056 its reverse (6501202), we get a palindrome (8522258).

It can be divided in two parts, 20210 and 56, that multiplied together give a triangular number (1131760 = T₁₅₀₄).

The spelling of 2021056 in words is "two million, twenty-one thousand, fifty-six".