561185 has 4 divisors (see below), whose sum is σ = 673428. Its totient is φ = 448944.

The previous prime is 561181. The next prime is 561191. The reversal of 561185 is 581165.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 173056 + 388129 = 416^2 + 623^2 .

It is a cyclic number.

It is not a de Polignac number, because 561185 - 2² = 561181 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 561185.

It is not an unprimeable number, because it can be changed into a prime (561181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56114 + ... + 56123.

It is an arithmetic number, because the mean of its divisors is an integer number (168357).

2⁵⁶¹¹⁸⁵ is an apocalyptic number.

It is an amenable number.

561185 is a deficient number, since it is larger than the sum of its proper divisors (112243).

561185 is a wasteful number, since it uses less digits than its factorization.

561185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112242.

The product of its digits is 1200, while the sum is 26.

The square root of 561185 is about 749.1228203706. The cubic root of 561185 is about 82.4838045956.

The spelling of 561185 in words is "five hundred sixty-one thousand, one hundred eighty-five".