775961 has 4 divisors (see below), whose sum is σ = 801024. Its totient is φ = 750900.

The previous prime is 775949. The next prime is 775963. The reversal of 775961 is 169577.

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: 169577 = 67 ⋅2531.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-775961 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 775961.

It is not an unprimeable number, because it can be changed into a prime (775963) 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, 12485 + ... + 12546.

It is an arithmetic number, because the mean of its divisors is an integer number (200256).

2⁷⁷⁵⁹⁶¹ is an apocalyptic number.

It is an amenable number.

775961 is a deficient number, since it is larger than the sum of its proper divisors (25063).

775961 is a wasteful number, since it uses less digits than its factorization.

775961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25062.

The product of its digits is 13230, while the sum is 35.

The square root of 775961 is about 880.8864853090. The cubic root of 775961 is about 91.8924783567.

The spelling of 775961 in words is "seven hundred seventy-five thousand, nine hundred sixty-one".