871925 has 6 divisors (see below), whose sum is σ = 1081218. Its totient is φ = 697520.

The previous prime is 871919. The next prime is 871931. The reversal of 871925 is 529178.

It is an interprime number because it is at equal distance from previous prime (871919) and next prime (871931).

It can be written as a sum of positive squares in 3 ways, for example, as 128881 + 743044 = 359^2 + 862^2 .

It is not a de Polignac number, because 871925 - 2¹⁰ = 870901 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 871891 and 871900.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 871925.

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 5 ways as a sum of consecutive naturals, for example, 17414 + ... + 17463.

It is an arithmetic number, because the mean of its divisors is an integer number (180203).

2⁸⁷¹⁹²⁵ is an apocalyptic number.

It is an amenable number.

871925 is a deficient number, since it is larger than the sum of its proper divisors (209293).

871925 is a wasteful number, since it uses less digits than its factorization.

871925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34887 (or 34882 counting only the distinct ones).

The product of its digits is 5040, while the sum is 32.

The square root of 871925 is about 933.7692434429. The cubic root of 871925 is about 95.5343845191.

The spelling of 871925 in words is "eight hundred seventy-one thousand, nine hundred twenty-five".