561000285 has 12 divisors (see below), whose sum is σ = 972400572. Its totient is φ = 299200128.

The previous prime is 561000281. The next prime is 561000287. The reversal of 561000285 is 582000165.

561000285 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 117223929 + 443776356 = 10827^2 + 21066^2 .

It is not a de Polignac number, because 561000285 - 2² = 561000281 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561000281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6233292 + ... + 6233381.

It is an arithmetic number, because the mean of its divisors is an integer number (81033381).

Almost surely, 2^561000285 is an apocalyptic number.

It is an amenable number.

561000285 is a deficient number, since it is larger than the sum of its proper divisors (411400287).

561000285 is a wasteful number, since it uses less digits than its factorization.

561000285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12466684 (or 12466681 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 561000285 is about 23685.4445810080. Note that the first 3 decimals coincide. The cubic root of 561000285 is about 824.7475370753.

The spelling of 561000285 in words is "five hundred sixty-one million, two hundred eighty-five", and thus it is an aban number.