12909201 has 4 divisors (see below), whose sum is σ = 17212272. Its totient is φ = 8606132.

The previous prime is 12909179. The next prime is 12909217. The reversal of 12909201 is 10290921.

12909201 is digitally balanced in base 2 and base 4, because in such bases 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12909201 is a prime.

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, 2151531 + ... + 2151536.

It is an arithmetic number, because the mean of its divisors is an integer number (4303068).

Almost surely, 2^12909201 is an apocalyptic number.

It is an amenable number.

12909201 is a deficient number, since it is larger than the sum of its proper divisors (4303071).

12909201 is an equidigital number, since it uses as much as digits as its factorization.

12909201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4303070.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 12909201 is about 3592.9376560135. The cubic root of 12909201 is about 234.5847563626.

It can be divided in two parts, 1290920 and 1, that added together give a palindrome (1290921).

The spelling of 12909201 in words is "twelve million, nine hundred nine thousand, two hundred one".