12655216 has 60 divisors (see below), whose sum is σ = 29669232. Its totient is φ = 5121792.

The previous prime is 12655193. The next prime is 12655219. The reversal of 12655216 is 61255621.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12655219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40276 + ... + 40588.

Almost surely, 2^12655216 is an apocalyptic number.

12655216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12655216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14834616).

12655216 is an abundant number, since it is smaller than the sum of its proper divisors (17014016).

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

12655216 is a wasteful number, since it uses less digits than its factorization.

12655216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366 (or 341 counting only the distinct ones).

The product of its digits is 3600, while the sum is 28.

The square root of 12655216 is about 3557.4170404944. The cubic root of 12655216 is about 233.0360913472.

The spelling of 12655216 in words is "twelve million, six hundred fifty-five thousand, two hundred sixteen".