12987211 has 4 divisors (see below), whose sum is σ = 13165192. Its totient is φ = 12809232.

The previous prime is 12987199. The next prime is 12987217. The reversal of 12987211 is 11278921.

12987211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12987211 - 2⁵ = 12987179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12987217) 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, 88881 + ... + 89026.

It is an arithmetic number, because the mean of its divisors is an integer number (3291298).

Almost surely, 2^12987211 is an apocalyptic number.

12987211 is a deficient number, since it is larger than the sum of its proper divisors (177981).

12987211 is an equidigital number, since it uses as much as digits as its factorization.

12987211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177980.

The product of its digits is 2016, while the sum is 31.

The square root of 12987211 is about 3603.7773238645. Note that the first 3 decimals coincide. The cubic root of 12987211 is about 235.0563377829.

The spelling of 12987211 in words is "twelve million, nine hundred eighty-seven thousand, two hundred eleven".