12921085 has 8 divisors (see below), whose sum is σ = 15533280. Its totient is φ = 10318224.

The previous prime is 12921061. The next prime is 12921089. The reversal of 12921085 is 58012921.

12921085 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 12921085 - 2⁵ = 12921053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12921089) 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 7 ways as a sum of consecutive naturals, for example, 1206 + ... + 5224.

It is an arithmetic number, because the mean of its divisors is an integer number (1941660).

Almost surely, 2^12921085 is an apocalyptic number.

It is an amenable number.

12921085 is a deficient number, since it is larger than the sum of its proper divisors (2612195).

12921085 is an equidigital number, since it uses as much as digits as its factorization.

12921085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4667.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 12921085 is about 3594.5910754911. The cubic root of 12921085 is about 234.6567192520.

The spelling of 12921085 in words is "twelve million, nine hundred twenty-one thousand, eighty-five".