871906 has 32 divisors (see below), whose sum is σ = 1612800. Its totient is φ = 352800.

The previous prime is 871901. The next prime is 871919. The reversal of 871906 is 609178.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21246 + ... + 21286.

It is an arithmetic number, because the mean of its divisors is an integer number (50400).

2⁸⁷¹⁹⁰⁶ is an apocalyptic number.

871906 is a deficient number, since it is larger than the sum of its proper divisors (740894).

871906 is a wasteful number, since it uses less digits than its factorization.

871906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95 (or 81 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 871906 is about 933.7590695677. The cubic root of 871906 is about 95.5336905885.

The spelling of 871906 in words is "eight hundred seventy-one thousand, nine hundred six".