12921073 has 8 divisors (see below), whose sum is σ = 14289696. Its totient is φ = 11584800.

The previous prime is 12921061. The next prime is 12921089. The reversal of 12921073 is 37012921.

12921073 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 12921073 - 2²¹ = 10823921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12921053) 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 7 ways as a sum of consecutive naturals, for example, 7243 + ... + 8848.

It is an arithmetic number, because the mean of its divisors is an integer number (1786212).

Almost surely, 2^12921073 is an apocalyptic number.

It is an amenable number.

12921073 is a deficient number, since it is larger than the sum of its proper divisors (1368623).

12921073 is a wasteful number, since it uses less digits than its factorization.

12921073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16175.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 12921073 is about 3594.5894063161. The cubic root of 12921073 is about 234.6566466089.

Adding to 12921073 its reverse (37012921), we get a palindrome (49933994).

The spelling of 12921073 in words is "twelve million, nine hundred twenty-one thousand, seventy-three".