561015025 has 12 divisors (see below), whose sum is σ = 698178652. Its totient is φ = 447186240.

The previous prime is 561015019. The next prime is 561015067. The reversal of 561015025 is 520510165.

It can be written as a sum of positive squares in 6 ways, for example, as 192682161 + 368332864 = 13881^2 + 19192^2 .

It is not a de Polignac number, because 561015025 - 2¹³ = 561006833 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33582 + ... + 47431.

Almost surely, 2^561015025 is an apocalyptic number.

It is an amenable number.

561015025 is a deficient number, since it is larger than the sum of its proper divisors (137163627).

561015025 is a wasteful number, since it uses less digits than its factorization.

561015025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81300 (or 81295 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 561015025 is about 23685.7557405289. The cubic root of 561015025 is about 824.7547602875.

The spelling of 561015025 in words is "five hundred sixty-one million, fifteen thousand, twenty-five".