12543020 has 36 divisors (see below), whose sum is σ = 30643200. Its totient is φ = 4300128.

The previous prime is 12542989. The next prime is 12543053. The reversal of 12543020 is 2034521.

It is a self number, because there is not a number n which added to its sum of digits gives 12543020.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 5420 + ... + 7379.

It is an arithmetic number, because the mean of its divisors is an integer number (851200).

Almost surely, 2^12543020 is an apocalyptic number.

12543020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12543020 is an abundant number, since it is smaller than the sum of its proper divisors (18100180).

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

12543020 is a wasteful number, since it uses less digits than its factorization.

12543020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12822 (or 12813 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 12543020 is about 3541.6126270387. The cubic root of 12543020 is about 232.3453783665.

Adding to 12543020 its reverse (2034521), we get a palindrome (14577541).

The spelling of 12543020 in words is "twelve million, five hundred forty-three thousand, twenty".