12785418 has 32 divisors (see below), whose sum is σ = 28900800. Its totient is φ = 4188528.

The previous prime is 12785413. The next prime is 12785419. The reversal of 12785418 is 81458721.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (12785413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1180 + ... + 5192.

It is an arithmetic number, because the mean of its divisors is an integer number (903150).

Almost surely, 2^12785418 is an apocalyptic number.

12785418 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12785418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14450400).

12785418 is an abundant number, since it is smaller than the sum of its proper divisors (16115382).

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

12785418 is a wasteful number, since it uses less digits than its factorization.

12785418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4083 (or 4077 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 12785418 is about 3575.6702868134. The cubic root of 12785418 is about 233.8325560815.

It can be divided in two parts, 12785 and 418, that added together give a triangular number (13203 = T₁₆₂).

The spelling of 12785418 in words is "twelve million, seven hundred eighty-five thousand, four hundred eighteen".