671112 has 64 divisors (see below), whose sum is σ = 2016000. Its totient is φ = 205632.

The previous prime is 671093. The next prime is 671123. The reversal of 671112 is 211176.

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

It is an unprimeable number.

671112 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2689 + ... + 2927.

It is an arithmetic number, because the mean of its divisors is an integer number (31500).

2⁶⁷¹¹¹² 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 671112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1008000).

671112 is an abundant number, since it is smaller than the sum of its proper divisors (1344888).

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

671112 is a wasteful number, since it uses less digits than its factorization.

671112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267 (or 257 counting only the distinct ones).

The product of its digits is 84, while the sum is 18.

The square root of 671112 is about 819.2142576884. The cubic root of 671112 is about 87.5517843129.

Adding to 671112 its reverse (211176), we get a palindrome (882288).

The spelling of 671112 in words is "six hundred seventy-one thousand, one hundred twelve".