671012120 has 64 divisors (see below), whose sum is σ = 1588101120. Its totient is φ = 254669184.

The previous prime is 671012107. The next prime is 671012123. The reversal of 671012120 is 21210176.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 671012092 and 671012101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671012123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113969 + ... + 119711.

It is an arithmetic number, because the mean of its divisors is an integer number (24814080).

Almost surely, 2^671012120 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 671012120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (794050560).

671012120 is an abundant number, since it is smaller than the sum of its proper divisors (917089000).

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

671012120 is a wasteful number, since it uses less digits than its factorization.

671012120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5904 (or 5900 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 671012120 is about 25903.9016366261. The cubic root of 671012120 is about 875.4744072293.

Adding to 671012120 its reverse (21210176), we get a palindrome (692222296).

The spelling of 671012120 in words is "six hundred seventy-one million, twelve thousand, one hundred twenty".