12521232 has 60 divisors (see below), whose sum is σ = 35472060. Its totient is φ = 4122624.

The previous prime is 12521219. The next prime is 12521233. The reversal of 12521232 is 23212521.

12521232 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 7485696 + 5035536 = 2736^2 + 2244^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (12521233) 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, 12328 + ... + 13304.

It is an arithmetic number, because the mean of its divisors is an integer number (591201).

Almost surely, 2^12521232 is an apocalyptic number.

12521232 is a gapful number since it is divisible by the number (12) 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 12521232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17736030).

12521232 is an abundant number, since it is smaller than the sum of its proper divisors (22950828).

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

12521232 is a wasteful number, since it uses less digits than its factorization.

12521232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080 (or 1071 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 12521232 is about 3538.5352902013. The cubic root of 12521232 is about 232.2107676392.

Adding to 12521232 its reverse (23212521), we get a palindrome (35733753).

The spelling of 12521232 in words is "twelve million, five hundred twenty-one thousand, two hundred thirty-two".