12985218 has 32 divisors (see below), whose sum is σ = 29790720. Its totient is φ = 4188240.

The previous prime is 12985213. The next prime is 12985223. The reversal of 12985218 is 81258921.

12985218 is a `hidden beast` number, since 129 + 8 + 521 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (12985213) and next prime (12985223).

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 (12985213) 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, 2205 + ... + 5552.

It is an arithmetic number, because the mean of its divisors is an integer number (930960).

Almost surely, 2^12985218 is an apocalyptic number.

12985218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12985218 is an abundant number, since it is smaller than the sum of its proper divisors (16805502).

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

12985218 is a wasteful number, since it uses less digits than its factorization.

12985218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7799 (or 7793 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 12985218 is about 3603.5007978353. The cubic root of 12985218 is about 235.0443133576.

It can be divided in two parts, 12985 and 218, that added together give a triangular number (13203 = T₁₆₂).

The spelling of 12985218 in words is "twelve million, nine hundred eighty-five thousand, two hundred eighteen".