12558138 has 64 divisors (see below), whose sum is σ = 28553472. Its totient is φ = 3660800.

The previous prime is 12558127. The next prime is 12558151. The reversal of 12558138 is 83185521.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12558099 and 12558108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124288 + ... + 124388.

It is an arithmetic number, because the mean of its divisors is an integer number (446148).

Almost surely, 2^12558138 is an apocalyptic number.

12558138 is an abundant number, since it is smaller than the sum of its proper divisors (15995334).

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

12558138 is a wasteful number, since it uses less digits than its factorization.

12558138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199.

The product of its digits is 9600, while the sum is 33.

The square root of 12558138 is about 3543.7463227494. The cubic root of 12558138 is about 232.4386888861.

The spelling of 12558138 in words is "twelve million, five hundred fifty-eight thousand, one hundred thirty-eight".