561775 has 12 divisors (see below), whose sum is σ = 727632. Its totient is φ = 429440.

The previous prime is 561767. The next prime is 561787. The reversal of 561775 is 577165.

561775 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 561775 - 2³ = 561767 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 11 ways as a sum of consecutive naturals, for example, 87 + ... + 1063.

It is an arithmetic number, because the mean of its divisors is an integer number (60636).

2⁵⁶¹⁷⁷⁵ is an apocalyptic number.

561775 is a deficient number, since it is larger than the sum of its proper divisors (165857).

561775 is a wasteful number, since it uses less digits than its factorization.

561775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010 (or 1005 counting only the distinct ones).

The product of its digits is 7350, while the sum is 31.

The square root of 561775 is about 749.5165108255. The cubic root of 561775 is about 82.5127008300.

The spelling of 561775 in words is "five hundred sixty-one thousand, seven hundred seventy-five".