12125838 has 16 divisors (see below), whose sum is σ = 25528320. Its totient is φ = 3829176.

The previous prime is 12125837. The next prime is 12125843. The reversal of 12125838 is 83852121.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12125837) 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 7 ways as a sum of consecutive naturals, for example, 53070 + ... + 53297.

It is an arithmetic number, because the mean of its divisors is an integer number (1595520).

Almost surely, 2^12125838 is an apocalyptic number.

12125838 is an abundant number, since it is smaller than the sum of its proper divisors (13402482).

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

12125838 is a wasteful number, since it uses less digits than its factorization.

12125838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106391.

The product of its digits is 3840, while the sum is 30.

The square root of 12125838 is about 3482.2173970044. The cubic root of 12125838 is about 229.7403370786.

Adding to 12125838 its reverse (83852121), we get a palindrome (95977959).

The spelling of 12125838 in words is "twelve million, one hundred twenty-five thousand, eight hundred thirty-eight".