12868515 has 24 divisors (see below), whose sum is σ = 24334128. Its totient is φ = 6239040.

The previous prime is 12868501. The next prime is 12868517. The reversal of 12868515 is 51586821.

12868515 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12868515 - 2⁵ = 12868483 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12868515.

It is not an unprimeable number, because it can be changed into a prime (12868517) 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, 12504 + ... + 13493.

It is an arithmetic number, because the mean of its divisors is an integer number (1013922).

Almost surely, 2^12868515 is an apocalyptic number.

12868515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12868515 is a deficient number, since it is larger than the sum of its proper divisors (11465613).

12868515 is a wasteful number, since it uses less digits than its factorization.

12868515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26019 (or 26016 counting only the distinct ones).

The product of its digits is 19200, while the sum is 36.

The square root of 12868515 is about 3587.2712470623. The cubic root of 12868515 is about 234.3380496416.

It can be divided in two parts, 1286 and 8515, that added together give a square (9801 = 99²).

The spelling of 12868515 in words is "twelve million, eight hundred sixty-eight thousand, five hundred fifteen".