2112905 has 4 divisors (see below), whose sum is σ = 2535492. Its totient is φ = 1690320.

The previous prime is 2112893. The next prime is 2112919. The reversal of 2112905 is 5092112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1666681 + 446224 = 1291^2 + 668^2 .

It is not a de Polignac number, because 2112905 - 2⁶ = 2112841 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211286 + ... + 211295.

It is an arithmetic number, because the mean of its divisors is an integer number (633873).

2^2112905 is an apocalyptic number.

It is an amenable number.

2112905 is a deficient number, since it is larger than the sum of its proper divisors (422587).

2112905 is an equidigital number, since it uses as much as digits as its factorization.

2112905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422586.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 2112905 is about 1453.5835029334. The cubic root of 2112905 is about 128.3196964577.

The spelling of 2112905 in words is "two million, one hundred twelve thousand, nine hundred five".