12555138 has 16 divisors (see below), whose sum is σ = 25164576. Its totient is φ = 4176000.

The previous prime is 12555121. The next prime is 12555149. The reversal of 12555138 is 83155521.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1138 + ... + 5138.

It is an arithmetic number, because the mean of its divisors is an integer number (1572786).

Almost surely, 2^12555138 is an apocalyptic number.

12555138 is an abundant number, since it is smaller than the sum of its proper divisors (12609438).

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

12555138 is a wasteful number, since it uses less digits than its factorization.

12555138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4529.

The product of its digits is 6000, while the sum is 30.

The square root of 12555138 is about 3543.3230166046. The cubic root of 12555138 is about 232.4201784030.

It can be divided in two parts, 1255513 and 8, that added together give a palindrome (1255521).

The spelling of 12555138 in words is "twelve million, five hundred fifty-five thousand, one hundred thirty-eight".