775965 has 24 divisors (see below), whose sum is σ = 1326240. Its totient is φ = 387328.

The previous prime is 775963. The next prime is 775987. The reversal of 775965 is 569577.

It is not a de Polignac number, because 775965 - 2¹ = 775963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (775963) 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 23 ways as a sum of consecutive naturals, for example, 4246 + ... + 4424.

It is an arithmetic number, because the mean of its divisors is an integer number (55260).

2⁷⁷⁵⁹⁶⁵ is an apocalyptic number.

It is an amenable number.

775965 is a deficient number, since it is larger than the sum of its proper divisors (550275).

775965 is a wasteful number, since it uses less digits than its factorization.

775965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221 (or 204 counting only the distinct ones).

The product of its digits is 66150, while the sum is 39.

The square root of 775965 is about 880.8887557461. Note that the first 3 decimals coincide. The cubic root of 775965 is about 91.8926362552.

The spelling of 775965 in words is "seven hundred seventy-five thousand, nine hundred sixty-five".