12681087 has 16 divisors (see below), whose sum is σ = 17424000. Its totient is φ = 8199072.

The previous prime is 12681079. The next prime is 12681089. The reversal of 12681087 is 78018621.

It is a happy number.

It is not a de Polignac number, because 12681087 - 2³ = 12681079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12681089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25164 + ... + 25662.

It is an arithmetic number, because the mean of its divisors is an integer number (1089000).

Almost surely, 2^12681087 is an apocalyptic number.

12681087 is a deficient number, since it is larger than the sum of its proper divisors (4742913).

12681087 is a wasteful number, since it uses less digits than its factorization.

12681087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742.

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 12681087 is about 3561.0513896882. The cubic root of 12681087 is about 233.1947814639.

The spelling of 12681087 in words is "twelve million, six hundred eighty-one thousand, eighty-seven".