12867138 has 12 divisors (see below), whose sum is σ = 27878838. Its totient is φ = 4289040.

The previous prime is 12867131. The next prime is 12867187. The reversal of 12867138 is 83176821.

It can be written as a sum of positive squares in only one way, i.e., 10517049 + 2350089 = 3243^2 + 1533^2 .

It is a super-2 number, since 2×12867138² = 331126480622088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12867131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 357403 + ... + 357438.

Almost surely, 2^12867138 is an apocalyptic number.

12867138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12867138 is an abundant number, since it is smaller than the sum of its proper divisors (15011700).

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

12867138 is a wasteful number, since it uses less digits than its factorization.

12867138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714849 (or 714846 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 12867138 is about 3587.0793133133. The cubic root of 12867138 is about 234.3296908681.

The spelling of 12867138 in words is "twelve million, eight hundred sixty-seven thousand, one hundred thirty-eight".