12699128 has 32 divisors (see below), whose sum is σ = 26762400. Its totient is φ = 5605248.

The previous prime is 12699107. The next prime is 12699133. The reversal of 12699128 is 82199621.

12699128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12699128² = 322535703920768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12699091 and 12699100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263 + ... + 5046.

It is an arithmetic number, because the mean of its divisors is an integer number (836325).

Almost surely, 2^12699128 is an apocalyptic number.

It is an amenable number.

12699128 is an abundant number, since it is smaller than the sum of its proper divisors (14063272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12699128 is a wasteful number, since it uses less digits than its factorization.

12699128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5351 (or 5347 counting only the distinct ones).

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

The square root of 12699128 is about 3563.5835895907. The cubic root of 12699128 is about 233.3053154567.

The spelling of 12699128 in words is "twelve million, six hundred ninety-nine thousand, one hundred twenty-eight".