12678291 has 6 divisors (see below), whose sum is σ = 18313100. Its totient is φ = 8452188.

The previous prime is 12678271. The next prime is 12678299. The reversal of 12678291 is 19287621.

It is not a de Polignac number, because 12678291 - 2²³ = 4289683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12678299) 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 5 ways as a sum of consecutive naturals, for example, 704341 + ... + 704358.

Almost surely, 2^12678291 is an apocalyptic number.

12678291 is a deficient number, since it is larger than the sum of its proper divisors (5634809).

12678291 is a wasteful number, since it uses less digits than its factorization.

12678291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1408705 (or 1408702 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 12678291 is about 3560.6587873594. The cubic root of 12678291 is about 233.1776414891.

The spelling of 12678291 in words is "twelve million, six hundred seventy-eight thousand, two hundred ninety-one".