12786887 has 4 divisors (see below), whose sum is σ = 12967056. Its totient is φ = 12606720.

The previous prime is 12786871. The next prime is 12786889. The reversal of 12786887 is 78868721.

It is a happy number.

12786887 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 12786887 - 2⁴ = 12786871 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12786889) 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, 89978 + ... + 90119.

It is an arithmetic number, because the mean of its divisors is an integer number (3241764).

Almost surely, 2^12786887 is an apocalyptic number.

12786887 is a deficient number, since it is larger than the sum of its proper divisors (180169).

12786887 is an equidigital number, since it uses as much as digits as its factorization.

12786887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180168.

The product of its digits is 301056, while the sum is 47.

The square root of 12786887 is about 3575.8756969447. The cubic root of 12786887 is about 233.8415112540.

The spelling of 12786887 in words is "twelve million, seven hundred eighty-six thousand, eight hundred eighty-seven".