12811140 has 72 divisors (see below), whose sum is σ = 39294528. Its totient is φ = 3378240.

The previous prime is 12811109. The next prime is 12811151. The reversal of 12811140 is 4111821.

12811140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18195 + ... + 18885.

Almost surely, 2^12811140 is an apocalyptic number.

12811140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12811140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19647264).

12811140 is an abundant number, since it is smaller than the sum of its proper divisors (26483388).

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

12811140 is a wasteful number, since it uses less digits than its factorization.

12811140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809 (or 804 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 12811140 is about 3579.2652877371. The cubic root of 12811140 is about 233.9892609580.

Adding to 12811140 its reverse (4111821), we get a palindrome (16922961).

The spelling of 12811140 in words is "twelve million, eight hundred eleven thousand, one hundred forty".