2105599 has 4 divisors (see below), whose sum is σ = 2216440. Its totient is φ = 1994760.

The previous prime is 2105591. The next prime is 2105611. The reversal of 2105599 is 9955012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2105599 - 2³ = 2105591 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2105599.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55392 + ... + 55429.

It is an arithmetic number, because the mean of its divisors is an integer number (554110).

2^2105599 is an apocalyptic number.

2105599 is a deficient number, since it is larger than the sum of its proper divisors (110841).

2105599 is a wasteful number, since it uses less digits than its factorization.

2105599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110840.

The product of its (nonzero) digits is 4050, while the sum is 31.

The square root of 2105599 is about 1451.0682272037. The cubic root of 2105599 is about 128.1716244353.

It can be divided in two parts, 2105 and 599, that added together give a square (2704 = 52²).

The spelling of 2105599 in words is "two million, one hundred five thousand, five hundred ninety-nine".