12687015 has 32 divisors (see below), whose sum is σ = 23452416. Its totient is φ = 5788160.

The previous prime is 12687011. The next prime is 12687019. The reversal of 12687015 is 51078621.

12687015 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12687011) and next prime (12687019).

It is not a de Polignac number, because 12687015 - 2² = 12687011 is a prime.

It is a super-2 number, since 2×12687015² = 321920699220450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12687011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 544 + ... + 5066.

It is an arithmetic number, because the mean of its divisors is an integer number (732888).

Almost surely, 2^12687015 is an apocalyptic number.

12687015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12687015 is a deficient number, since it is larger than the sum of its proper divisors (10765401).

12687015 is a wasteful number, since it uses less digits than its factorization.

12687015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4559.

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 12687015 is about 3561.8836308897. The cubic root of 12687015 is about 233.2311128213.

The spelling of 12687015 in words is "twelve million, six hundred eighty-seven thousand, fifteen".