2765405 has 16 divisors (see below), whose sum is σ = 3507840. Its totient is φ = 2088768.

The previous prime is 2765387. The next prime is 2765419. The reversal of 2765405 is 5045672.

2765405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2765405 - 2¹⁶ = 2699869 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15899 + ... + 16071.

It is an arithmetic number, because the mean of its divisors is an integer number (219240).

2^2765405 is an apocalyptic number.

It is an amenable number.

2765405 is a deficient number, since it is larger than the sum of its proper divisors (742435).

2765405 is a wasteful number, since it uses less digits than its factorization.

2765405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 2765405 is about 1662.9506907903. The cubic root of 2765405 is about 140.3630881339.

The spelling of 2765405 in words is "two million, seven hundred sixty-five thousand, four hundred five".