7130765 has 4 divisors (see below), whose sum is σ = 8556924. Its totient is φ = 5704608.

The previous prime is 7130749. The next prime is 7130789. The reversal of 7130765 is 5670317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5670317 = 1109 ⋅5113.

It can be written as a sum of positive squares in 2 ways, for example, as 3118756 + 4012009 = 1766^2 + 2003^2 .

It is a cyclic number.

It is not a de Polignac number, because 7130765 - 2⁴ = 7130749 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 713072 + ... + 713081.

It is an arithmetic number, because the mean of its divisors is an integer number (2139231).

Almost surely, 2^7130765 is an apocalyptic number.

It is an amenable number.

7130765 is a deficient number, since it is larger than the sum of its proper divisors (1426159).

7130765 is a wasteful number, since it uses less digits than its factorization.

7130765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1426158.

The product of its (nonzero) digits is 4410, while the sum is 29.

The square root of 7130765 is about 2670.3492280973. The cubic root of 7130765 is about 192.4769410733.

The spelling of 7130765 in words is "seven million, one hundred thirty thousand, seven hundred sixty-five".