12612138 has 32 divisors (see below), whose sum is σ = 31449600. Its totient is φ = 3275760.

The previous prime is 12612109. The next prime is 12612139. The reversal of 12612138 is 83121621.

It is not an unprimeable number, because it can be changed into a prime (12612139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13188 + ... + 14111.

It is an arithmetic number, because the mean of its divisors is an integer number (982800).

Almost surely, 2^12612138 is an apocalyptic number.

12612138 is an abundant number, since it is smaller than the sum of its proper divisors (18837462).

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

12612138 is a wasteful number, since it uses less digits than its factorization.

12612138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27322.

The product of its digits is 576, while the sum is 24.

The square root of 12612138 is about 3551.3572053512. The cubic root of 12612138 is about 232.7713746525.

Adding to 12612138 its reverse (83121621), we get a palindrome (95733759).

The spelling of 12612138 in words is "twelve million, six hundred twelve thousand, one hundred thirty-eight".