12155055 has 48 divisors (see below), whose sum is σ = 22075872. Its totient is φ = 5702400.

The previous prime is 12155029. The next prime is 12155057. The reversal of 12155055 is 55055121.

It is not a de Polignac number, because 12155055 - 2⁵ = 12155023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12155057) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 67065 + ... + 67245.

It is an arithmetic number, because the mean of its divisors is an integer number (459914).

Almost surely, 2^12155055 is an apocalyptic number.

12155055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12155055 is a deficient number, since it is larger than the sum of its proper divisors (9920817).

12155055 is a wasteful number, since it uses less digits than its factorization.

12155055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 24.

The square root of 12155055 is about 3486.4100447308. The cubic root of 12155055 is about 229.9247075542.

The spelling of 12155055 in words is "twelve million, one hundred fifty-five thousand, fifty-five".