12928442 has 4 divisors (see below), whose sum is σ = 19392666. Its totient is φ = 6464220.

The previous prime is 12928439. The next prime is 12928459. The reversal of 12928442 is 24482921.

It is a happy number.

12928442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10621081 + 2307361 = 3259^2 + 1519^2 .

It is a super-2 number, since 2×12928442² = 334289225094728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12928399 and 12928408.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3232109 + ... + 3232112.

Almost surely, 2^12928442 is an apocalyptic number.

12928442 is a deficient number, since it is larger than the sum of its proper divisors (6464224).

12928442 is an equidigital number, since it uses as much as digits as its factorization.

12928442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6464223.

The product of its digits is 9216, while the sum is 32.

The square root of 12928442 is about 3595.6142729720. The cubic root of 12928442 is about 234.7012470383.

The spelling of 12928442 in words is "twelve million, nine hundred twenty-eight thousand, four hundred forty-two".