2115806 has 24 divisors (see below), whose sum is σ = 3990000. Its totient is φ = 823680.

The previous prime is 2115791. The next prime is 2115823. The reversal of 2115806 is 6085112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1070 + ... + 2318.

It is an arithmetic number, because the mean of its divisors is an integer number (166250).

2^2115806 is an apocalyptic number.

2115806 is a deficient number, since it is larger than the sum of its proper divisors (1874194).

2115806 is a wasteful number, since it uses less digits than its factorization.

2115806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280 (or 1269 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 2115806 is about 1454.5810393374. The cubic root of 2115806 is about 128.3783968727.

The spelling of 2115806 in words is "two million, one hundred fifteen thousand, eight hundred six".