2165872 has 10 divisors (see below), whose sum is σ = 4196408. Its totient is φ = 1082928.

The previous prime is 2165857. The next prime is 2165873. The reversal of 2165872 is 2785612.

2165872 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67668 + ... + 67699.

2^2165872 is an apocalyptic number.

It is an amenable number.

2165872 is a deficient number, since it is larger than the sum of its proper divisors (2030536).

2165872 is a wasteful number, since it uses less digits than its factorization.

2165872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135375 (or 135369 counting only the distinct ones).

The product of its digits is 6720, while the sum is 31.

The square root of 2165872 is about 1471.6901847875. The cubic root of 2165872 is about 129.3831128272.

The spelling of 2165872 in words is "two million, one hundred sixty-five thousand, eight hundred seventy-two".