12523520 has 48 divisors (see below), whose sum is σ = 30073680. Its totient is φ = 5005312.

The previous prime is 12523519. The next prime is 12523541. The reversal of 12523520 is 2532521.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 12523492 and 12523501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9629 + ... + 10851.

It is an arithmetic number, because the mean of its divisors is an integer number (626535).

Almost surely, 2^12523520 is an apocalyptic number.

12523520 is a gapful number since it is divisible by the number (10) 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 12523520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15036840).

12523520 is an abundant number, since it is smaller than the sum of its proper divisors (17550160).

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

12523520 is an equidigital number, since it uses as much as digits as its factorization.

12523520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250 (or 1230 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 12523520 is about 3538.8585730430. The cubic root of 12523520 is about 232.2249107064.

Subtracting from 12523520 its reverse (2532521), we obtain a palindrome (9990999).

The spelling of 12523520 in words is "twelve million, five hundred twenty-three thousand, five hundred twenty".