12891814 has 16 divisors (see below), whose sum is σ = 22051008. Its totient is φ = 5599872.

The previous prime is 12891811. The next prime is 12891829. The reversal of 12891814 is 41819821.

12891814 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a self number, because there is not a number n which added to its sum of digits gives 12891814.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12891811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14142 + ... + 15025.

It is an arithmetic number, because the mean of its divisors is an integer number (1378188).

Almost surely, 2^12891814 is an apocalyptic number.

12891814 is a deficient number, since it is larger than the sum of its proper divisors (9159194).

12891814 is a wasteful number, since it uses less digits than its factorization.

12891814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29199.

The product of its digits is 4608, while the sum is 34.

The square root of 12891814 is about 3590.5172329346. The cubic root of 12891814 is about 234.4793907478.

The spelling of 12891814 in words is "twelve million, eight hundred ninety-one thousand, eight hundred fourteen".