12387155 has 8 divisors (see below), whose sum is σ = 16215984. Its totient is φ = 9008800.

The previous prime is 12387149. The next prime is 12387217. The reversal of 12387155 is 55178321.

12387155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12387155 - 2¹⁰ = 12386131 is a prime.

It is a Duffinian 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, 112556 + ... + 112665.

It is an arithmetic number, because the mean of its divisors is an integer number (2026998).

Almost surely, 2^12387155 is an apocalyptic number.

12387155 is a deficient number, since it is larger than the sum of its proper divisors (3828829).

12387155 is a wasteful number, since it uses less digits than its factorization.

12387155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225237.

The product of its digits is 8400, while the sum is 32.

The square root of 12387155 is about 3519.5390323166. The cubic root of 12387155 is about 231.3789560755.

It can be divided in two parts, 123 and 87155, that added together give a palindrome (87278).

The spelling of 12387155 in words is "twelve million, three hundred eighty-seven thousand, one hundred fifty-five".