12921084 has 72 divisors (see below), whose sum is σ = 36236928. Its totient is φ = 3849120.

The previous prime is 12921061. The next prime is 12921089. The reversal of 12921084 is 48012921.

12921084 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12921089) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26289 + ... + 26775.

Almost surely, 2^12921084 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12921084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18118464).

12921084 is an abundant number, since it is smaller than the sum of its proper divisors (23315844).

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

12921084 is a wasteful number, since it uses less digits than its factorization.

12921084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575 (or 570 counting only the distinct ones).

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

The square root of 12921084 is about 3594.5909363932. The cubic root of 12921084 is about 234.6567131984.

The spelling of 12921084 in words is "twelve million, nine hundred twenty-one thousand, eighty-four".