12711720 has 128 divisors (see below), whose sum is σ = 44870400. Its totient is φ = 2820096.

The previous prime is 12711719. The next prime is 12711731. The reversal of 12711720 is 2711721.

It is a happy number.

12711720 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 (21).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30876 + ... + 31284.

It is an arithmetic number, because the mean of its divisors is an integer number (350550).

Almost surely, 2^12711720 is an apocalyptic number.

12711720 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 12711720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22435200).

12711720 is an abundant number, since it is smaller than the sum of its proper divisors (32158680).

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

12711720 is a wasteful number, since it uses less digits than its factorization.

12711720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467 (or 463 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 21.

The square root of 12711720 is about 3565.3499127014. The cubic root of 12711720 is about 233.3824023787.

Subtracting from 12711720 its reverse (2711721), we obtain a palindrome (9999999).

It can be divided in two parts, 12711 and 720, that added together give a palindrome (13431).

The spelling of 12711720 in words is "twelve million, seven hundred eleven thousand, seven hundred twenty".