561543025 has 12 divisors (see below), whose sum is σ = 697242700. Its totient is φ = 448634880.

The previous prime is 561543007. The next prime is 561543029. The reversal of 561543025 is 520345165.

It can be written as a sum of positive squares in 6 ways, for example, as 31438449 + 530104576 = 5607^2 + 23024^2 .

It is not a de Polignac number, because 561543025 - 2¹¹ = 561540977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561543029) 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, 4621 + ... + 33829.

Almost surely, 2^561543025 is an apocalyptic number.

It is an amenable number.

561543025 is a deficient number, since it is larger than the sum of its proper divisors (135699675).

561543025 is a wasteful number, since it uses less digits than its factorization.

561543025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29988 (or 29983 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 561543025 is about 23696.8990587376. The cubic root of 561543025 is about 825.0134188206.

The spelling of 561543025 in words is "five hundred sixty-one million, five hundred forty-three thousand, twenty-five".