2112749 has 4 divisors (see below), whose sum is σ = 2126364. Its totient is φ = 2099136.

The previous prime is 2112727. The next prime is 2112751. The reversal of 2112749 is 9472112.

2112749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1612900 + 499849 = 1270^2 + 707^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112749 - 2⁸ = 2112493 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112779) 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, 6572 + ... + 6885.

It is an arithmetic number, because the mean of its divisors is an integer number (531591).

2^2112749 is an apocalyptic number.

It is an amenable number.

2112749 is a deficient number, since it is larger than the sum of its proper divisors (13615).

2112749 is a wasteful number, since it uses less digits than its factorization.

2112749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13614.

The product of its digits is 1008, while the sum is 26.

The square root of 2112749 is about 1453.5298414549. The cubic root of 2112749 is about 128.3165383467.

The spelling of 2112749 in words is "two million, one hundred twelve thousand, seven hundred forty-nine".