561804025 has 6 divisors (see below), whose sum is σ = 696637022. Its totient is φ = 449443200.

The previous prime is 561804011. The next prime is 561804029. The reversal of 561804025 is 520408165.

It can be written as a sum of positive squares in 3 ways, for example, as 3143529 + 558660496 = 1773^2 + 23636^2 .

It is not a de Polignac number, because 561804025 - 2⁹ = 561803513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561804029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11236056 + ... + 11236105.

Almost surely, 2^561804025 is an apocalyptic number.

It is an amenable number.

561804025 is a deficient number, since it is larger than the sum of its proper divisors (134832997).

561804025 is a wasteful number, since it uses less digits than its factorization.

561804025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22472171 (or 22472166 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 561804025 is about 23702.4054686439. The cubic root of 561804025 is about 825.1412185560.

It can be divided in two parts, 56 and 1804025, that added together give a palindrome (1804081).

The spelling of 561804025 in words is "five hundred sixty-one million, eight hundred four thousand, twenty-five".