12533520 has 40 divisors (see below), whose sum is σ = 38854656. Its totient is φ = 3342208.

The previous prime is 12533519. The next prime is 12533527. The reversal of 12533520 is 2533521.

It is a tau number, because it is divible by the number of its divisors (40).

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (12533527) 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, 25872 + ... + 26351.

Almost surely, 2^12533520 is an apocalyptic number.

12533520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12533520 is an abundant number, since it is smaller than the sum of its proper divisors (26321136).

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

12533520 is a wasteful number, since it uses less digits than its factorization.

12533520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52239 (or 52233 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 12533520 is about 3540.2711760542. The cubic root of 12533520 is about 232.2867046024.

Subtracting from 12533520 its reverse (2533521), we obtain a palindrome (9999999).

The spelling of 12533520 in words is "twelve million, five hundred thirty-three thousand, five hundred twenty".