12921834 has 8 divisors (see below), whose sum is σ = 25843680. Its totient is φ = 4307276.

The previous prime is 12921833. The next prime is 12921863. The reversal of 12921834 is 43812921.

It is a sphenic number, since it is the product of 3 distinct primes.

12921834 is an admirable number.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (12921833) 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 3 ways as a sum of consecutive naturals, for example, 1076814 + ... + 1076825.

It is an arithmetic number, because the mean of its divisors is an integer number (3230460).

Almost surely, 2^12921834 is an apocalyptic number.

12921834 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12921834 is a wasteful number, since it uses less digits than its factorization.

12921834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2153644.

The product of its digits is 3456, while the sum is 30.

The square root of 12921834 is about 3594.6952582938. The cubic root of 12921834 is about 234.6612533007.

The spelling of 12921834 in words is "twelve million, nine hundred twenty-one thousand, eight hundred thirty-four".