12685518 has 16 divisors (see below), whose sum is σ = 28190160. Its totient is φ = 4228488.

The previous prime is 12685513. The next prime is 12685537. The reversal of 12685518 is 81558621.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12685511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117405 + ... + 117512.

It is an arithmetic number, because the mean of its divisors is an integer number (1761885).

Almost surely, 2^12685518 is an apocalyptic number.

12685518 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12685518 is an abundant number, since it is smaller than the sum of its proper divisors (15504642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12685518 is a wasteful number, since it uses less digits than its factorization.

12685518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234928 (or 234922 counting only the distinct ones).

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

The square root of 12685518 is about 3561.6734830694. The cubic root of 12685518 is about 233.2219391187.

It can be divided in two parts, 12685 and 518, that added together give a triangular number (13203 = T₁₆₂).

The spelling of 12685518 in words is "twelve million, six hundred eighty-five thousand, five hundred eighteen".