870012 has 72 divisors (see below), whose sum is σ = 2598960. Its totient is φ = 243360.

The previous prime is 870007. The next prime is 870013. The reversal of 870012 is 210078.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870013) by changing a digit.

870012 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 23 ways as a sum of consecutive naturals, for example, 66918 + ... + 66930.

2⁸⁷⁰⁰¹² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 870012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1299480).

870012 is an abundant number, since it is smaller than the sum of its proper divisors (1728948).

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

870012 is a wasteful number, since it uses less digits than its factorization.

870012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60 (or 29 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 870012 is about 932.7443379619. The cubic root of 870012 is about 95.4644660066.

The spelling of 870012 in words is "eight hundred seventy thousand, twelve".