12447216 has 40 divisors (see below), whose sum is σ = 35729360. Its totient is φ = 4148928.

The previous prime is 12447199. The next prime is 12447217. The reversal of 12447216 is 61274421.

12447216 is a `hidden beast` number, since 1 + 2 + 447 + 216 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 12447216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12447217) 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, 13975 + ... + 14838.

It is an arithmetic number, because the mean of its divisors is an integer number (893234).

Almost surely, 2^12447216 is an apocalyptic number.

12447216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12447216 is an abundant number, since it is smaller than the sum of its proper divisors (23282144).

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

12447216 is a wasteful number, since it uses less digits than its factorization.

12447216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28830 (or 28818 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 12447216 is about 3528.0612239586. The cubic root of 12447216 is about 231.7523119552.

The spelling of 12447216 in words is "twelve million, four hundred forty-seven thousand, two hundred sixteen".