12945687 has 16 divisors (see below), whose sum is σ = 18908640. Its totient is φ = 7841792.

The previous prime is 12945679. The next prime is 12945701. The reversal of 12945687 is 78654921.

It is a cyclic number.

It is not a de Polignac number, because 12945687 - 2³ = 12945679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12945607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2898 + ... + 5855.

It is an arithmetic number, because the mean of its divisors is an integer number (1181790).

Almost surely, 2^12945687 is an apocalyptic number.

12945687 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

12945687 is a deficient number, since it is larger than the sum of its proper divisors (5962953).

12945687 is a wasteful number, since it uses less digits than its factorization.

12945687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8802.

The product of its digits is 120960, while the sum is 42.

The square root of 12945687 is about 3598.0115341672. The cubic root of 12945687 is about 234.8055551662.

The spelling of 12945687 in words is "twelve million, nine hundred forty-five thousand, six hundred eighty-seven".