12987811 has 8 divisors (see below), whose sum is σ = 13723920. Its totient is φ = 12256992.

The previous prime is 12987797. The next prime is 12987829. The reversal of 12987811 is 11878921.

12987811 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-12987811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12987841) 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, 4401 + ... + 6733.

It is an arithmetic number, because the mean of its divisors is an integer number (1715490).

Almost surely, 2^12987811 is an apocalyptic number.

12987811 is a deficient number, since it is larger than the sum of its proper divisors (736109).

12987811 is a wasteful number, since it uses less digits than its factorization.

12987811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2645.

The product of its digits is 8064, while the sum is 37.

The square root of 12987811 is about 3603.8605688900. The cubic root of 12987811 is about 235.0599575396.

The spelling of 12987811 in words is "twelve million, nine hundred eighty-seven thousand, eight hundred eleven".