12820542 has 32 divisors (see below), whose sum is σ = 29417472. Its totient is φ = 3648864.

The previous prime is 12820531. The next prime is 12820547. The reversal of 12820542 is 24502821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12820547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15688 + ... + 16484.

It is an arithmetic number, because the mean of its divisors is an integer number (919296).

Almost surely, 2^12820542 is an apocalyptic number.

12820542 is an abundant number, since it is smaller than the sum of its proper divisors (16596930).

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

12820542 is a wasteful number, since it uses less digits than its factorization.

12820542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 12820542 is about 3580.5784448885. The cubic root of 12820542 is about 234.0464879513.

The spelling of 12820542 in words is "twelve million, eight hundred twenty thousand, five hundred forty-two".