12771912 has 16 divisors (see below), whose sum is σ = 31929840. Its totient is φ = 4257296.

The previous prime is 12771911. The next prime is 12771929. The reversal of 12771912 is 21917721.

It is a happy number.

It is a super-2 number, since 2×12771912² = 326243472271488, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12771912.

It is not an unprimeable number, because it can be changed into a prime (12771911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266058 + ... + 266105.

It is an arithmetic number, because the mean of its divisors is an integer number (1995615).

Almost surely, 2^12771912 is an apocalyptic number.

12771912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12771912 is an abundant number, since it is smaller than the sum of its proper divisors (19157928).

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

12771912 is a wasteful number, since it uses less digits than its factorization.

12771912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532172 (or 532168 counting only the distinct ones).

The product of its digits is 1764, while the sum is 30.

The square root of 12771912 is about 3573.7811908398. The cubic root of 12771912 is about 233.7501899776.

The spelling of 12771912 in words is "twelve million, seven hundred seventy-one thousand, nine hundred twelve".