12897238 has 16 divisors (see below), whose sum is σ = 20916720. Its totient is φ = 5943456.

The previous prime is 12897197. The next prime is 12897251. The reversal of 12897238 is 83279821.

It is a self number, because there is not a number n which added to its sum of digits gives 12897238.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3181 + ... + 5992.

It is an arithmetic number, because the mean of its divisors is an integer number (1307295).

Almost surely, 2^12897238 is an apocalyptic number.

12897238 is a deficient number, since it is larger than the sum of its proper divisors (8019482).

12897238 is a wasteful number, since it uses less digits than its factorization.

12897238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9231.

The product of its digits is 48384, while the sum is 40.

The square root of 12897238 is about 3591.2724764351. The cubic root of 12897238 is about 234.5122704727.

The spelling of 12897238 in words is "twelve million, eight hundred ninety-seven thousand, two hundred thirty-eight".