12521323 has 8 divisors (see below), whose sum is σ = 13213520. Its totient is φ = 11832480.

The previous prime is 12521309. The next prime is 12521329. The reversal of 12521323 is 32312521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12521323 - 2⁵ = 12521291 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12521323.

It is not an unprimeable number, because it can be changed into a prime (12521329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12061 + ... + 13057.

It is an arithmetic number, because the mean of its divisors is an integer number (1651690).

Almost surely, 2^12521323 is an apocalyptic number.

12521323 is a deficient number, since it is larger than the sum of its proper divisors (692197).

12521323 is an equidigital number, since it uses as much as digits as its factorization.

12521323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1677.

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

The square root of 12521323 is about 3538.5481486056. The cubic root of 12521323 is about 232.2113301804.

Adding to 12521323 its reverse (32312521), we get a palindrome (44833844).

The spelling of 12521323 in words is "twelve million, five hundred twenty-one thousand, three hundred twenty-three".