12820734 has 32 divisors (see below), whose sum is σ = 28715040. Its totient is φ = 4239936.

The previous prime is 12820727. The next prime is 12820747. The reversal of 12820734 is 43702821.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 12820698 and 12820707.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 6532 + ... + 8264.

It is an arithmetic number, because the mean of its divisors is an integer number (897345).

Almost surely, 2^12820734 is an apocalyptic number.

12820734 is an abundant number, since it is smaller than the sum of its proper divisors (15894306).

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

12820734 is a wasteful number, since it uses less digits than its factorization.

12820734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1881 (or 1875 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 12820734 is about 3580.6052560985. The cubic root of 12820734 is about 234.0476563029.

The spelling of 12820734 in words is "twelve million, eight hundred twenty thousand, seven hundred thirty-four".