2765905 has 4 divisors (see below), whose sum is σ = 3319092. Its totient is φ = 2212720.

The previous prime is 2765891. The next prime is 2765921. The reversal of 2765905 is 5095672.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1648656 + 1117249 = 1284^2 + 1057^2 .

It is not a de Polignac number, because 2765905 - 2¹⁷ = 2634833 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276586 + ... + 276595.

It is an arithmetic number, because the mean of its divisors is an integer number (829773).

2^2765905 is an apocalyptic number.

It is an amenable number.

2765905 is a deficient number, since it is larger than the sum of its proper divisors (553187).

2765905 is an equidigital number, since it uses as much as digits as its factorization.

2765905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553186.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 2765905 is about 1663.1010191807. The cubic root of 2765905 is about 140.3715470896.

The spelling of 2765905 in words is "two million, seven hundred sixty-five thousand, nine hundred five".