871586142 has 64 divisors (see below), whose sum is σ = 2100363264. Its totient is φ = 235847520.

The previous prime is 871586123. The next prime is 871586143. The reversal of 871586142 is 241685178.

It is a super-3 number, since 3×871586142³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a house number.

It is a junction number, because it is equal to n+sod(n) for n = 871586094 and 871586103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871586143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54073 + ... + 68315.

It is an arithmetic number, because the mean of its divisors is an integer number (32818176).

Almost surely, 2^871586142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 871586142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1050181632).

871586142 is an abundant number, since it is smaller than the sum of its proper divisors (1228777122).

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

871586142 is a wasteful number, since it uses less digits than its factorization.

871586142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14333.

The product of its digits is 107520, while the sum is 42.

The square root of 871586142 is about 29522.6377886530. The cubic root of 871586142 is about 955.2200700767.

The spelling of 871586142 in words is "eight hundred seventy-one million, five hundred eighty-six thousand, one hundred forty-two".