765601 has 4 divisors (see below), whose sum is σ = 798912. Its totient is φ = 732292.

The previous prime is 765587. The next prime is 765613. The reversal of 765601 is 106567.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 106567 = 61 ⋅1747.

It is a cyclic number.

It is not a de Polignac number, because 765601 - 2¹³ = 757409 is a prime.

It is a super-2 number, since 2×765601² = 1172289782402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (763601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16621 + ... + 16666.

It is an arithmetic number, because the mean of its divisors is an integer number (199728).

2⁷⁶⁵⁶⁰¹ is an apocalyptic number.

It is an amenable number.

765601 is a deficient number, since it is larger than the sum of its proper divisors (33311).

765601 is a wasteful number, since it uses less digits than its factorization.

765601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33310.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 765601 is about 874.9862856068. The cubic root of 765601 is about 91.4816868403.

The spelling of 765601 in words is "seven hundred sixty-five thousand, six hundred one".