12696138 has 96 divisors (see below), whose sum is σ = 35433216. Its totient is φ = 3193344.

The previous prime is 12696133. The next prime is 12696139. The reversal of 12696138 is 83169621.

It is a super-2 number, since 2×12696138² = 322383840230088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12696133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 37506 + ... + 37842.

It is an arithmetic number, because the mean of its divisors is an integer number (369096).

Almost surely, 2^12696138 is an apocalyptic number.

12696138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12696138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17716608).

12696138 is an abundant number, since it is smaller than the sum of its proper divisors (22737078).

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

12696138 is a wasteful number, since it uses less digits than its factorization.

12696138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388 (or 385 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 12696138 is about 3563.1640433749. The cubic root of 12696138 is about 233.2870034999.

It can be divided in two parts, 1269613 and 8, that added together give a palindrome (1269621).

The spelling of 12696138 in words is "twelve million, six hundred ninety-six thousand, one hundred thirty-eight".