871812025 has 24 divisors (see below), whose sum is σ = 1256437440. Its totient is φ = 587674560.

The previous prime is 871812023. The next prime is 871812077. The reversal of 871812025 is 520218178.

It is not a de Polignac number, because 871812025 - 2¹ = 871812023 is a prime.

It is not an unprimeable number, because it can be changed into a prime (871812023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31894 + ... + 52543.

It is an arithmetic number, because the mean of its divisors is an integer number (52351560).

Almost surely, 2^871812025 is an apocalyptic number.

It is an amenable number.

871812025 is a deficient number, since it is larger than the sum of its proper divisors (384625415).

871812025 is a wasteful number, since it uses less digits than its factorization.

871812025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84513 (or 84508 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 34.

The square root of 871812025 is about 29526.4631305546. The cubic root of 871812025 is about 955.3025822261.

The spelling of 871812025 in words is "eight hundred seventy-one million, eight hundred twelve thousand, twenty-five".