12921088 has 36 divisors (see below), whose sum is σ = 27318060. Its totient is φ = 6078464.

The previous prime is 12921061. The next prime is 12921089. The reversal of 12921088 is 88012921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3873024 + 9048064 = 1968^2 + 3008^2 .

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

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2868 + ... + 5836.

It is an arithmetic number, because the mean of its divisors is an integer number (758835).

Almost surely, 2^12921088 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 12921088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13659030).

12921088 is an abundant number, since it is smaller than the sum of its proper divisors (14396972).

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

12921088 is an equidigital number, since it uses as much as digits as its factorization.

12921088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3002 (or 2988 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 12921088 is about 3594.5914927847. The cubic root of 12921088 is about 234.6567374128.

The spelling of 12921088 in words is "twelve million, nine hundred twenty-one thousand, eighty-eight".