12323521 has 16 divisors (see below), whose sum is σ = 15431040. Its totient is φ = 9596160.

The previous prime is 12323513. The next prime is 12323537. The reversal of 12323521 is 12532321.

It is not a de Polignac number, because 12323521 - 2³ = 12323513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12323501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1666 + ... + 5236.

It is an arithmetic number, because the mean of its divisors is an integer number (964440).

Almost surely, 2^12323521 is an apocalyptic number.

It is an amenable number.

12323521 is a deficient number, since it is larger than the sum of its proper divisors (3107519).

12323521 is a wasteful number, since it uses less digits than its factorization.

12323521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3624.

The product of its digits is 360, while the sum is 19.

The square root of 12323521 is about 3510.4872881126. The cubic root of 12323521 is about 230.9820704086.

Adding to 12323521 its reverse (12532321), we get a palindrome (24855842).

It can be divided in two parts, 123235 and 21, that added together give a triangular number (123256 = T₄₉₆).

The spelling of 12323521 in words is "twelve million, three hundred twenty-three thousand, five hundred twenty-one".