12821166 has 96 divisors (see below), whose sum is σ = 31868928. Its totient is φ = 3849120.

The previous prime is 12821153. The next prime is 12821227. The reversal of 12821166 is 66112821.

12821166 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

Its product of digits (1152) is a multiple of the sum of its prime divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 346500 + ... + 346536.

It is an arithmetic number, because the mean of its divisors is an integer number (331968).

Almost surely, 2^12821166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12821166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15934464).

12821166 is an abundant number, since it is smaller than the sum of its proper divisors (19047762).

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

12821166 is a wasteful number, since it uses less digits than its factorization.

12821166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 96 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 12821166 is about 3580.6655805869. The cubic root of 12821166 is about 234.0502850513.

Adding to 12821166 its reverse (66112821), we get a palindrome (78933987).

The spelling of 12821166 in words is "twelve million, eight hundred twenty-one thousand, one hundred sixty-six".