765530 has 16 divisors (see below), whose sum is σ = 1415880. Its totient is φ = 297792.

The previous prime is 765521. The next prime is 765533. The reversal of 765530 is 35567.

It can be written as a sum of positive squares in 4 ways, for example, as 635209 + 130321 = 797^2 + 361^2 .

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 765530.

It is not an unprimeable number, because it can be changed into a prime (765533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 665 + ... + 1404.

2⁷⁶⁵⁵³⁰ is an apocalyptic number.

765530 is a deficient number, since it is larger than the sum of its proper divisors (650350).

765530 is a wasteful number, since it uses less digits than its factorization.

765530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2113.

The product of its (nonzero) digits is 3150, while the sum is 26.

The square root of 765530 is about 874.9457126016. The cubic root of 765530 is about 91.4788588222.

It can be divided in two parts, 765 and 530, that multiplied together give a triangular number (405450 = T₉₀₀).

The spelling of 765530 in words is "seven hundred sixty-five thousand, five hundred thirty".