12521336 has 8 divisors (see below), whose sum is σ = 23477520. Its totient is φ = 6260664.

The previous prime is 12521329. The next prime is 12521339. The reversal of 12521336 is 63312521.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12521339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 782576 + ... + 782591.

It is an arithmetic number, because the mean of its divisors is an integer number (2934690).

Almost surely, 2^12521336 is an apocalyptic number.

It is an amenable number.

12521336 is a deficient number, since it is larger than the sum of its proper divisors (10956184).

12521336 is a wasteful number, since it uses less digits than its factorization.

12521336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565173 (or 1565169 counting only the distinct ones).

The product of its digits is 1080, while the sum is 23.

The square root of 12521336 is about 3538.5499855167. The cubic root of 12521336 is about 232.2114105432.

Adding to 12521336 its reverse (63312521), we get a palindrome (75833857).

The spelling of 12521336 in words is "twelve million, five hundred twenty-one thousand, three hundred thirty-six".