12909841 has 4 divisors (see below), whose sum is σ = 14754112. Its totient is φ = 11065572.

The previous prime is 12909839. The next prime is 12909887. The reversal of 12909841 is 14890921.

12909841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12909841 - 2¹ = 12909839 is a prime.

It is a super-4 number, since 4×12909841⁴ (a number of 30 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12909797 and 12909806.

It is not an unprimeable number, because it can be changed into a prime (12909241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 922125 + ... + 922138.

It is an arithmetic number, because the mean of its divisors is an integer number (3688528).

Almost surely, 2^12909841 is an apocalyptic number.

It is an amenable number.

12909841 is a deficient number, since it is larger than the sum of its proper divisors (1844271).

12909841 is an equidigital number, since it uses as much as digits as its factorization.

12909841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1844270.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 12909841 is about 3593.0267185202. The cubic root of 12909841 is about 234.5886329713.

The spelling of 12909841 in words is "twelve million, nine hundred nine thousand, eight hundred forty-one".