2111945 has 32 divisors (see below), whose sum is σ = 3041280. Its totient is φ = 1391040.

The previous prime is 2111939. The next prime is 2111953. The reversal of 2111945 is 5491112.

It is a happy number.

It is not a de Polignac number, because 2111945 - 2¹⁰ = 2110921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2111945.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44912 + ... + 44958.

It is an arithmetic number, because the mean of its divisors is an integer number (95040).

2^2111945 is an apocalyptic number.

It is an amenable number.

2111945 is a deficient number, since it is larger than the sum of its proper divisors (929335).

2111945 is a wasteful number, since it uses less digits than its factorization.

2111945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125.

The product of its digits is 360, while the sum is 23.

The square root of 2111945 is about 1453.2532470289. The cubic root of 2111945 is about 128.3002594630.

The spelling of 2111945 in words is "two million, one hundred eleven thousand, nine hundred forty-five".