12015055 has 24 divisors (see below), whose sum is σ = 15942960. Its totient is φ = 8686080.

The previous prime is 12015041. The next prime is 12015067. The reversal of 12015055 is 55051021.

It is not a de Polignac number, because 12015055 - 2¹⁷ = 11883983 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49735 + ... + 49975.

It is an arithmetic number, because the mean of its divisors is an integer number (664290).

Almost surely, 2^12015055 is an apocalyptic number.

12015055 is a deficient number, since it is larger than the sum of its proper divisors (3927905).

12015055 is a wasteful number, since it uses less digits than its factorization.

12015055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 12015055 is about 3466.2739360876. The cubic root of 12015055 is about 229.0385511269.

Adding to 12015055 its reverse (55051021), we get a palindrome (67066076).

The spelling of 12015055 in words is "twelve million, fifteen thousand, fifty-five".