130765 has 4 divisors (see below), whose sum is σ = 156924. Its totient is φ = 104608.

The previous prime is 130729. The next prime is 130769. The reversal of 130765 is 567031.

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 30276 + 100489 = 174^2 + 317^2 .

It is a cyclic number.

It is not a de Polignac number, because 130765 - 2⁹ = 130253 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13072 + ... + 13081.

It is an arithmetic number, because the mean of its divisors is an integer number (39231).

2¹³⁰⁷⁶⁵ is an apocalyptic number.

It is an amenable number.

130765 is a deficient number, since it is larger than the sum of its proper divisors (26159).

130765 is an equidigital number, since it uses as much as digits as its factorization.

130765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26158.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 130765 is about 361.6144355526. The cubic root of 130765 is about 50.7571434694.

Adding to 130765 its reverse (567031), we get a palindrome (697796).

The spelling of 130765 in words is "one hundred thirty thousand, seven hundred sixty-five".