12908121 has 8 divisors (see below), whose sum is σ = 17766144. Its totient is φ = 8327760.

The previous prime is 12908101. The next prime is 12908123. The reversal of 12908121 is 12180921.

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

It is not a de Polignac number, because 12908121 - 2⁶ = 12908057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12908091 and 12908100.

It is not an unprimeable number, because it can be changed into a prime (12908123) 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, 69306 + ... + 69491.

It is an arithmetic number, because the mean of its divisors is an integer number (2220768).

Almost surely, 2^12908121 is an apocalyptic number.

It is an amenable number.

12908121 is a deficient number, since it is larger than the sum of its proper divisors (4858023).

12908121 is a wasteful number, since it uses less digits than its factorization.

12908121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138831.

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 12908121 is about 3592.7873580272. The cubic root of 12908121 is about 234.5782142948.

The spelling of 12908121 in words is "twelve million, nine hundred eight thousand, one hundred twenty-one".