12721488 has 160 divisors (see below), whose sum is σ = 39580800. Its totient is φ = 3483648.

The previous prime is 12721477. The next prime is 12721519. The reversal of 12721488 is 88412721.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 343806 + ... + 343842.

It is an arithmetic number, because the mean of its divisors is an integer number (247380).

Almost surely, 2^12721488 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 12721488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19790400).

12721488 is an abundant number, since it is smaller than the sum of its proper divisors (26859312).

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

12721488 is a wasteful number, since it uses less digits than its factorization.

12721488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109 (or 103 counting only the distinct ones).

The product of its digits is 7168, while the sum is 33.

The square root of 12721488 is about 3566.7195011663. The cubic root of 12721488 is about 233.4421660098.

The spelling of 12721488 in words is "twelve million, seven hundred twenty-one thousand, four hundred eighty-eight".