12520550 has 48 divisors (see below), whose sum is σ = 26998272. Its totient is φ = 4231200.

The previous prime is 12520537. The next prime is 12520553. The reversal of 12520550 is 5502521.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12520553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28835 + ... + 29265.

It is an arithmetic number, because the mean of its divisors is an integer number (562464).

Almost surely, 2^12520550 is an apocalyptic number.

12520550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12520550 is an abundant number, since it is smaller than the sum of its proper divisors (14477722).

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

12520550 is a wasteful number, since it uses less digits than its factorization.

12520550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533 (or 528 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 12520550 is about 3538.4389213324. The cubic root of 12520550 is about 232.2065515839.

The spelling of 12520550 in words is "twelve million, five hundred twenty thousand, five hundred fifty".