525724561 has 4 divisors (see below), whose sum is σ = 525770532. Its totient is φ = 525678592.

The previous prime is 525724559. The next prime is 525724571. The reversal of 525724561 is 165427525.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 42823936 + 482900625 = 6544^2 + 21975^2 .

It is a cyclic number.

It is not a de Polignac number, because 525724561 - 2¹ = 525724559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 525724561.

It is not an unprimeable number, because it can be changed into a prime (525724531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9081 + ... + 33673.

It is an arithmetic number, because the mean of its divisors is an integer number (131442633).

Almost surely, 2^525724561 is an apocalyptic number.

It is an amenable number.

525724561 is a deficient number, since it is larger than the sum of its proper divisors (45971).

525724561 is a wasteful number, since it uses less digits than its factorization.

525724561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45970.

The product of its digits is 84000, while the sum is 37.

The square root of 525724561 is about 22928.6842404879. The cubic root of 525724561 is about 807.0852722463.

The spelling of 525724561 in words is "five hundred twenty-five million, seven hundred twenty-four thousand, five hundred sixty-one".