2056420 has 24 divisors (see below), whose sum is σ = 4347000. Its totient is φ = 817152.

The previous prime is 2056409. The next prime is 2056421. The reversal of 2056420 is 246502.

It can be written as a sum of positive squares in 4 ways, for example, as 729316 + 1327104 = 854^2 + 1152^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2056421) 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 7 ways as a sum of consecutive naturals, for example, 4356 + ... + 4804.

It is an arithmetic number, because the mean of its divisors is an integer number (181125).

2^2056420 is an apocalyptic number.

2056420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2056420 is an abundant number, since it is smaller than the sum of its proper divisors (2290580).

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

2056420 is a wasteful number, since it uses less digits than its factorization.

2056420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687 (or 685 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 2056420 is about 1434.0223150286. The cubic root of 2056420 is about 127.1658815710.

The spelling of 2056420 in words is "two million, fifty-six thousand, four hundred twenty".