859956 has 12 divisors (see below), whose sum is σ = 2006592. Its totient is φ = 286648.

The previous prime is 859939. The next prime is 859973. The reversal of 859956 is 659958.

It is an interprime number because it is at equal distance from previous prime (859939) and next prime (859973).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×859956³ = 1907875133384384448, which contains 333 as substring.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 35820 + ... + 35843.

It is an arithmetic number, because the mean of its divisors is an integer number (167216).

2⁸⁵⁹⁹⁵⁶ is an apocalyptic number.

859956 is the 587-th centered pentagonal number.

It is an amenable number.

859956 is an abundant number, since it is smaller than the sum of its proper divisors (1146636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

859956 is a wasteful number, since it uses less digits than its factorization.

859956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71670 (or 71668 counting only the distinct ones).

The product of its digits is 97200, while the sum is 42.

The square root of 859956 is about 927.3381260360. The cubic root of 859956 is about 95.0952322961.

The spelling of 859956 in words is "eight hundred fifty-nine thousand, nine hundred fifty-six".