12776771 has 8 divisors (see below), whose sum is σ = 14778624. Its totient is φ = 10819080.

The previous prime is 12776761. The next prime is 12776773. The reversal of 12776771 is 17767721.

12776771 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12776771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12776773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10415 + ... + 11576.

It is an arithmetic number, because the mean of its divisors is an integer number (1847328).

Almost surely, 2^12776771 is an apocalyptic number.

12776771 is a deficient number, since it is larger than the sum of its proper divisors (2001853).

12776771 is an equidigital number, since it uses as much as digits as its factorization.

12776771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22081.

The product of its digits is 28812, while the sum is 38.

The square root of 12776771 is about 3574.4609383794. The cubic root of 12776771 is about 233.7798291882.

It can be divided in two parts, 1 and 2776771, that added together give a palindrome (2776772).

The spelling of 12776771 in words is "twelve million, seven hundred seventy-six thousand, seven hundred seventy-one".