2305905 has 16 divisors (see below), whose sum is σ = 4216704. Its totient is φ = 1054080.

The previous prime is 2305903. The next prime is 2305909. The reversal of 2305905 is 5095032.

It is not a de Polignac number, because 2305905 - 2¹ = 2305903 is a prime.

2305905 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2305903) 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, 10876 + ... + 11085.

It is an arithmetic number, because the mean of its divisors is an integer number (263544).

2^2305905 is an apocalyptic number.

It is an amenable number.

2305905 is a deficient number, since it is larger than the sum of its proper divisors (1910799).

2305905 is a wasteful number, since it uses less digits than its factorization.

2305905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21976.

The product of its (nonzero) digits is 1350, while the sum is 24.

The square root of 2305905 is about 1518.5206616968. The cubic root of 2305905 is about 132.1134813828.

The spelling of 2305905 in words is "two million, three hundred five thousand, nine hundred five".