12897138 has 16 divisors (see below), whose sum is σ = 26036640. Its totient is φ = 4258656.

The previous prime is 12897103. The next prime is 12897163. The reversal of 12897138 is 83179821.

12897138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12897096 and 12897105.

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, 9403 + ... + 10686.

It is an arithmetic number, because the mean of its divisors is an integer number (1627290).

Almost surely, 2^12897138 is an apocalyptic number.

12897138 is an abundant number, since it is smaller than the sum of its proper divisors (13139502).

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

12897138 is a wasteful number, since it uses less digits than its factorization.

12897138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20201.

The product of its digits is 24192, while the sum is 39.

The square root of 12897138 is about 3591.2585537664. The cubic root of 12897138 is about 234.5116643665.

The spelling of 12897138 in words is "twelve million, eight hundred ninety-seven thousand, one hundred thirty-eight".