12897181 has 16 divisors (see below), whose sum is σ = 15459840. Its totient is φ = 10620720.

The previous prime is 12897173. The next prime is 12897191. The reversal of 12897181 is 18179821.

12897181 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12897181 - 2³ = 12897173 is a prime.

It is a super-2 number, since 2×12897181² = 332674555493522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12897181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12897191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3466 + ... + 6148.

It is an arithmetic number, because the mean of its divisors is an integer number (966240).

Almost surely, 2^12897181 is an apocalyptic number.

12897181 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12897181 is a deficient number, since it is larger than the sum of its proper divisors (2562659).

12897181 is a wasteful number, since it uses less digits than its factorization.

12897181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2736.

The product of its digits is 8064, while the sum is 37.

The square root of 12897181 is about 3591.2645405205. The cubic root of 12897181 is about 234.5119249925.

The spelling of 12897181 in words is "twelve million, eight hundred ninety-seven thousand, one hundred eighty-one".