12728234 has 4 divisors (see below), whose sum is σ = 19092354. Its totient is φ = 6364116.

The previous prime is 12728231. The next prime is 12728237. The reversal of 12728234 is 43282721.

12728234 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, and also an emirpimes, since its reverse is a distinct semiprime: 43282721 = 4219 ⋅10259.

It is an interprime number because it is at equal distance from previous prime (12728231) and next prime (12728237).

It can be written as a sum of positive squares in only one way, i.e., 10582009 + 2146225 = 3253^2 + 1465^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12728197 and 12728206.

It is not an unprimeable number, because it can be changed into a prime (12728231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3182057 + ... + 3182060.

Almost surely, 2^12728234 is an apocalyptic number.

12728234 is a deficient number, since it is larger than the sum of its proper divisors (6364120).

12728234 is an equidigital number, since it uses as much as digits as its factorization.

12728234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6364119.

The product of its digits is 5376, while the sum is 29.

The square root of 12728234 is about 3567.6650627546. The cubic root of 12728234 is about 233.4834222572.

The spelling of 12728234 in words is "twelve million, seven hundred twenty-eight thousand, two hundred thirty-four".