12885129 has 16 divisors (see below), whose sum is σ = 19920000. Its totient is φ = 8216208.

The previous prime is 12885121. The next prime is 12885149. The reversal of 12885129 is 92158821.

It is not a de Polignac number, because 12885129 - 2³ = 12885121 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12885093 and 12885102.

It is not an unprimeable number, because it can be changed into a prime (12885121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9754 + ... + 10995.

It is an arithmetic number, because the mean of its divisors is an integer number (1245000).

Almost surely, 2^12885129 is an apocalyptic number.

It is an amenable number.

12885129 is a deficient number, since it is larger than the sum of its proper divisors (7034871).

12885129 is a wasteful number, since it uses less digits than its factorization.

12885129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20781 (or 20775 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 12885129 is about 3589.5861878495. The cubic root of 12885129 is about 234.4388542816.

The spelling of 12885129 in words is "twelve million, eight hundred eighty-five thousand, one hundred twenty-nine".