775855 has 4 divisors (see below), whose sum is σ = 931032. Its totient is φ = 620680.

The previous prime is 775823. The next prime is 775861. The reversal of 775855 is 558577.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 558577 = 61 ⋅9157.

It is not a de Polignac number, because 775855 - 2⁵ = 775823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77581 + ... + 77590.

It is an arithmetic number, because the mean of its divisors is an integer number (232758).

2⁷⁷⁵⁸⁵⁵ is an apocalyptic number.

775855 is a deficient number, since it is larger than the sum of its proper divisors (155177).

775855 is a wasteful number, since it uses less digits than its factorization.

775855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155176.

The product of its digits is 49000, while the sum is 37.

The square root of 775855 is about 880.8263165914. The cubic root of 775855 is about 91.8882938482. Note that the first 3 decimals are identical.

The spelling of 775855 in words is "seven hundred seventy-five thousand, eight hundred fifty-five".