12698128 has 10 divisors (see below), whose sum is σ = 24602654. Its totient is φ = 6349056.

The previous prime is 12698123. The next prime is 12698129. The reversal of 12698128 is 82189621.

It can be written as a sum of positive squares in only one way, i.e., 11505664 + 1192464 = 3392^2 + 1092^2 .

It is a super-2 number, since 2×12698128² = 322484909408768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12698123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 396801 + ... + 396832.

Almost surely, 2^12698128 is an apocalyptic number.

It is an amenable number.

12698128 is a deficient number, since it is larger than the sum of its proper divisors (11904526).

12698128 is an equidigital number, since it uses as much as digits as its factorization.

12698128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793641 (or 793635 counting only the distinct ones).

The product of its digits is 13824, while the sum is 37.

The square root of 12698128 is about 3563.4432786281. The cubic root of 12698128 is about 233.2991913764.

The spelling of 12698128 in words is "twelve million, six hundred ninety-eight thousand, one hundred twenty-eight".