12728395 has 4 divisors (see below), whose sum is σ = 15274080. Its totient is φ = 10182712.

The previous prime is 12728389. The next prime is 12728447. The reversal of 12728395 is 59382721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 59382721 = 97 ⋅612193.

It is a cyclic number.

It is not a de Polignac number, because 12728395 - 2⁵ = 12728363 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1272835 + ... + 1272844.

It is an arithmetic number, because the mean of its divisors is an integer number (3818520).

Almost surely, 2^12728395 is an apocalyptic number.

12728395 is a deficient number, since it is larger than the sum of its proper divisors (2545685).

12728395 is an equidigital number, since it uses as much as digits as its factorization.

12728395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2545684.

The product of its digits is 30240, while the sum is 37.

The square root of 12728395 is about 3567.6876264606. The cubic root of 12728395 is about 233.4844067005.

The spelling of 12728395 in words is "twelve million, seven hundred twenty-eight thousand, three hundred ninety-five".