12523224 has 96 divisors (see below), whose sum is σ = 38085120. Its totient is φ = 3415104.

The previous prime is 12523219. The next prime is 12523229. The reversal of 12523224 is 42232521.

It is an interprime number because it is at equal distance from previous prime (12523219) and next prime (12523229).

It is a super-2 number, since 2×12523224² = 313662278708352, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 12523224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12523229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26817 + ... + 27279.

It is an arithmetic number, because the mean of its divisors is an integer number (396720).

Almost surely, 2^12523224 is an apocalyptic number.

12523224 is a gapful number since it is divisible by the number (14) 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 12523224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19042560).

12523224 is an abundant number, since it is smaller than the sum of its proper divisors (25561896).

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

12523224 is a wasteful number, since it uses less digits than its factorization.

12523224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509 (or 498 counting only the distinct ones).

The product of its digits is 960, while the sum is 21.

The square root of 12523224 is about 3538.8167514015. The cubic root of 12523224 is about 232.2230811059.

Adding to 12523224 its reverse (42232521), we get a palindrome (54755745).

The spelling of 12523224 in words is "twelve million, five hundred twenty-three thousand, two hundred twenty-four".