12155118 has 16 divisors (see below), whose sum is σ = 25148880. Its totient is φ = 3911936.

The previous prime is 12155081. The next prime is 12155123. The reversal of 12155118 is 81155121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34755 + ... + 35102.

It is an arithmetic number, because the mean of its divisors is an integer number (1571805).

Almost surely, 2^12155118 is an apocalyptic number.

12155118 is an abundant number, since it is smaller than the sum of its proper divisors (12993762).

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

12155118 is a wasteful number, since it uses less digits than its factorization.

12155118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69891.

The product of its digits is 400, while the sum is 24.

The square root of 12155118 is about 3486.4190798009. The cubic root of 12155118 is about 229.9251047890.

The spelling of 12155118 in words is "twelve million, one hundred fifty-five thousand, one hundred eighteen".