12885121 has 2 divisors, whose sum is σ = 12885122. Its totient is φ = 12885120.

The previous prime is 12885109. The next prime is 12885149. The reversal of 12885121 is 12158821.

It is an a-pointer prime, because the next prime (12885149) can be obtained adding 12885121 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12567025 + 318096 = 3545^2 + 564^2 .

It is a cyclic number.

It is not a de Polignac number, because 12885121 - 2¹⁵ = 12852353 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12885121.

It is not a weakly prime, because it can be changed into another prime (12885421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6442560 + 6442561.

It is an arithmetic number, because the mean of its divisors is an integer number (6442561).

Almost surely, 2^12885121 is an apocalyptic number.

It is an amenable number.

12885121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12885121 is an equidigital number, since it uses as much as digits as its factorization.

12885121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1280, while the sum is 28.

The square root of 12885121 is about 3589.5850735148. The cubic root of 12885121 is about 234.4388057629.

The spelling of 12885121 in words is "twelve million, eight hundred eighty-five thousand, one hundred twenty-one".