2116805 has 16 divisors (see below), whose sum is σ = 2695680. Its totient is φ = 1592448.

The previous prime is 2116801. The next prime is 2116811. The reversal of 2116805 is 5086112.

It is a cyclic number.

It is not a de Polignac number, because 2116805 - 2² = 2116801 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2116801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8969 + ... + 9201.

It is an arithmetic number, because the mean of its divisors is an integer number (168480).

2^2116805 is an apocalyptic number.

It is an amenable number.

2116805 is a deficient number, since it is larger than the sum of its proper divisors (578875).

2116805 is a wasteful number, since it uses less digits than its factorization.

2116805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340.

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

The square root of 2116805 is about 1454.9243966612. The cubic root of 2116805 is about 128.3985987625.

The spelling of 2116805 in words is "two million, one hundred sixteen thousand, eight hundred five".