765161 has 4 divisors (see below), whose sum is σ = 779652. Its totient is φ = 750672.

The previous prime is 765151. The next prime is 765169. The reversal of 765161 is 161567.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161567 = 7 ⋅23081.

It can be written as a sum of positive squares in 2 ways, for example, as 469225 + 295936 = 685^2 + 544^2 .

It is a cyclic number.

It is not a de Polignac number, because 765161 - 2⁶ = 765097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 765161.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 765161.

It is not an unprimeable number, because it can be changed into a prime (765169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7166 + ... + 7271.

It is an arithmetic number, because the mean of its divisors is an integer number (194913).

2⁷⁶⁵¹⁶¹ is an apocalyptic number.

It is an amenable number.

765161 is a deficient number, since it is larger than the sum of its proper divisors (14491).

765161 is a wasteful number, since it uses less digits than its factorization.

765161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14490.

The product of its digits is 1260, while the sum is 26.

The square root of 765161 is about 874.7348169588. The cubic root of 765161 is about 91.4641582775.

The spelling of 765161 in words is "seven hundred sixty-five thousand, one hundred sixty-one".