2105556 has 12 divisors (see below), whose sum is σ = 4912992. Its totient is φ = 701848.

The previous prime is 2105549. The next prime is 2105557. The reversal of 2105556 is 6555012.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87720 + ... + 87743.

It is an arithmetic number, because the mean of its divisors is an integer number (409416).

2^2105556 is an apocalyptic number.

It is an amenable number.

2105556 is an abundant number, since it is smaller than the sum of its proper divisors (2807436).

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

2105556 is a wasteful number, since it uses less digits than its factorization.

2105556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175470 (or 175468 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 2105556 is about 1451.0534104574. The cubic root of 2105556 is about 128.1707519334.

It can be divided in two parts, 2 and 105556, that multiplied together give a palindrome (211112).

The spelling of 2105556 in words is "two million, one hundred five thousand, five hundred fifty-six".