12891426 has 16 divisors (see below), whose sum is σ = 25972704. Its totient is φ = 4265504.

The previous prime is 12891409. The next prime is 12891433. The reversal of 12891426 is 62419821.

12891426 is nontrivially palindromic in base 13.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7020 + ... + 8663.

It is an arithmetic number, because the mean of its divisors is an integer number (1623294).

Almost surely, 2^12891426 is an apocalyptic number.

12891426 is an abundant number, since it is smaller than the sum of its proper divisors (13081278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12891426 is a wasteful number, since it uses less digits than its factorization.

12891426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15825.

The product of its digits is 6912, while the sum is 33.

The square root of 12891426 is about 3590.4632013154. The cubic root of 12891426 is about 234.4770383786.

The spelling of 12891426 in words is "twelve million, eight hundred ninety-one thousand, four hundred twenty-six".