765005 has 4 divisors (see below), whose sum is σ = 918012. Its totient is φ = 612000.

The previous prime is 764999. The next prime is 765007. The reversal of 765005 is 500567.

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 121801 + 643204 = 349^2 + 802^2 .

It is not a de Polignac number, because 765005 - 2⁴ = 764989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (765007) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 76496 + ... + 76505.

It is an arithmetic number, because the mean of its divisors is an integer number (229503).

2⁷⁶⁵⁰⁰⁵ is an apocalyptic number.

It is an amenable number.

765005 is a deficient number, since it is larger than the sum of its proper divisors (153007).

765005 is a wasteful number, since it uses less digits than its factorization.

765005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153006.

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 765005 is about 874.6456425319. The cubic root of 765005 is about 91.4579419916.

The spelling of 765005 in words is "seven hundred sixty-five thousand, five".