12969128 has 8 divisors (see below), whose sum is σ = 24317130. Its totient is φ = 6484560.

The previous prime is 12969127. The next prime is 12969137. The reversal of 12969128 is 82196921.

It can be written as a sum of positive squares in only one way, i.e., 9721924 + 3247204 = 3118^2 + 1802^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 12969091 and 12969100.

It is not an unprimeable number, because it can be changed into a prime (12969127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 810563 + ... + 810578.

Almost surely, 2^12969128 is an apocalyptic number.

It is an amenable number.

12969128 is a deficient number, since it is larger than the sum of its proper divisors (11348002).

12969128 is a wasteful number, since it uses less digits than its factorization.

12969128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621147 (or 1621143 counting only the distinct ones).

The product of its digits is 15552, while the sum is 38.

The square root of 12969128 is about 3601.2675546257. The cubic root of 12969128 is about 234.9471919971.

The spelling of 12969128 in words is "twelve million, nine hundred sixty-nine thousand, one hundred twenty-eight".