871506267025 has 9 divisors (see below), whose sum is σ = 1080673559121. Its totient is φ = 697201279440.

The previous prime is 871506267013. The next prime is 871506267053. The reversal of 871506267025 is 520762605178.

It is a happy number.

The square root of 871506267025 is 933545.

It is a perfect power (a square), and thus also a powerful number.

871506267025 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 4 ways, for example, as 66782446929 + 804723820096 = 258423^2 + 897064^2 .

It is not a de Polignac number, because 871506267025 - 2¹⁵ = 871506234257 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 871506267025.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4574371 + ... + 4761079.

Almost surely, 2^871506267025 is an apocalyptic number.

871506267025 is the 933545-th square number.

871506267025 is the 466773-rd centered octagonal number.

It is an amenable number.

871506267025 is a deficient number, since it is larger than the sum of its proper divisors (209167292096).

871506267025 is an frugal number, since it uses more digits than its factorization.

871506267025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373428 (or 186714 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 49.

Multiplying 871506267025 by its sum of digits (49), we get a square (42703807084225 = 6534815²).

The spelling of 871506267025 in words is "eight hundred seventy-one billion, five hundred six million, two hundred sixty-seven thousand, twenty-five".