12545520 has 80 divisors (see below), whose sum is σ = 41893152. Its totient is φ = 3087360.

The previous prime is 12545459. The next prime is 12545521. The reversal of 12545520 is 2554521.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12545521) 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, 1110 + ... + 5130.

Almost surely, 2^12545520 is an apocalyptic number.

12545520 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 12545520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20946576).

12545520 is an abundant number, since it is smaller than the sum of its proper divisors (29347632).

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

12545520 is a wasteful number, since it uses less digits than its factorization.

12545520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4050 (or 4044 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 12545520 is about 3541.9655560155. The cubic root of 12545520 is about 232.3608139064.

Subtracting from 12545520 its reverse (2554521), we obtain a palindrome (9990999).

The spelling of 12545520 in words is "twelve million, five hundred forty-five thousand, five hundred twenty".