12387015 has 24 divisors (see below), whose sum is σ = 21778848. Its totient is φ = 6511680.

The previous prime is 12387007. The next prime is 12387019. The reversal of 12387015 is 51078321.

12387015 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12387015 - 2³ = 12387007 is a prime.

It is a super-2 number, since 2×12387015² = 306876281220450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12387015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12387019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1257 + ... + 5133.

It is an arithmetic number, because the mean of its divisors is an integer number (907452).

Almost surely, 2^12387015 is an apocalyptic number.

12387015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12387015 is a deficient number, since it is larger than the sum of its proper divisors (9391833).

12387015 is a wasteful number, since it uses less digits than its factorization.

12387015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3959 (or 3956 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 12387015 is about 3519.5191432922. The cubic root of 12387015 is about 231.3780843883.

The spelling of 12387015 in words is "twelve million, three hundred eighty-seven thousand, fifteen".