12520530 has 48 divisors (see below), whose sum is σ = 35515584. Its totient is φ = 3035040.

The previous prime is 12520511. The next prime is 12520531. The reversal of 12520530 is 3502521.

It is a happy number.

12520530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12520531) 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, 5334 + ... + 7313.

It is an arithmetic number, because the mean of its divisors is an integer number (739908).

Almost surely, 2^12520530 is an apocalyptic number.

12520530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12520530 is an abundant number, since it is smaller than the sum of its proper divisors (22995054).

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

12520530 is a wasteful number, since it uses less digits than its factorization.

12520530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12671 (or 12668 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 12520530 is about 3538.4360952263. The cubic root of 12520530 is about 232.2064279436.

Subtracting from 12520530 its reverse (3502521), we obtain a square (9018009 = 3003²).

The spelling of 12520530 in words is "twelve million, five hundred twenty thousand, five hundred thirty".