12987711 has 24 divisors (see below), whose sum is σ = 21672144. Its totient is φ = 7407360.

The previous prime is 12987707. The next prime is 12987713. The reversal of 12987711 is 11778921.

12987711 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12987711 - 2² = 12987707 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12987713) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2176 + ... + 5541.

It is an arithmetic number, because the mean of its divisors is an integer number (903006).

Almost surely, 2^12987711 is an apocalyptic number.

12987711 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12987711 is a deficient number, since it is larger than the sum of its proper divisors (8684433).

12987711 is a wasteful number, since it uses less digits than its factorization.

12987711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7751 (or 7748 counting only the distinct ones).

The product of its digits is 7056, while the sum is 36.

The square root of 12987711 is about 3603.8466948526. The cubic root of 12987711 is about 235.0593542546.

It can be divided in two parts, 1298 and 7711, that added together give a palindrome (9009).

The spelling of 12987711 in words is "twelve million, nine hundred eighty-seven thousand, seven hundred eleven".