76565 has 4 divisors (see below), whose sum is σ = 91884. Its totient is φ = 61248.

The previous prime is 76561. The next prime is 76579. The reversal of 76565 is 56567.

76565 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56567 = 7 ⋅8081.

It can be written as a sum of positive squares in 2 ways, for example, as 7921 + 68644 = 89^2 + 262^2 .

It is a cyclic number.

It is not a de Polignac number, because 76565 - 2² = 76561 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76561) 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, 7652 + ... + 7661.

It is an arithmetic number, because the mean of its divisors is an integer number (22971).

2⁷⁶⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

76565 is a deficient number, since it is larger than the sum of its proper divisors (15319).

76565 is a wasteful number, since it uses less digits than its factorization.

76565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15318.

The product of its digits is 6300, while the sum is 29.

The square root of 76565 is about 276.7038127674. The cubic root of 76565 is about 42.4629434777.

The spelling of 76565 in words is "seventy-six thousand, five hundred sixty-five".