12125816 has 8 divisors (see below), whose sum is σ = 22735920. Its totient is φ = 6062904.

The previous prime is 12125809. The next prime is 12125837. The reversal of 12125816 is 61852121.

It is a tau number, because it is divible by the number of its divisors (8).

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 757856 + ... + 757871.

It is an arithmetic number, because the mean of its divisors is an integer number (2841990).

Almost surely, 2^12125816 is an apocalyptic number.

It is an amenable number.

12125816 is a deficient number, since it is larger than the sum of its proper divisors (10610104).

12125816 is a wasteful number, since it uses less digits than its factorization.

12125816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515733 (or 1515729 counting only the distinct ones).

The product of its digits is 960, while the sum is 26.

The square root of 12125816 is about 3482.2142380962. The cubic root of 12125816 is about 229.7401981386.

Adding to 12125816 its reverse (61852121), we get a palindrome (73977937).

The spelling of 12125816 in words is "twelve million, one hundred twenty-five thousand, eight hundred sixteen".