12728241 has 12 divisors (see below), whose sum is σ = 18645120. Its totient is φ = 8365560.

The previous prime is 12728237. The next prime is 12728249. The reversal of 12728241 is 14282721.

12728241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12728241 - 2² = 12728237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12728249) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9321 + ... + 10598.

It is an arithmetic number, because the mean of its divisors is an integer number (1553760).

Almost surely, 2^12728241 is an apocalyptic number.

It is an amenable number.

12728241 is a deficient number, since it is larger than the sum of its proper divisors (5916879).

12728241 is a wasteful number, since it uses less digits than its factorization.

12728241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19996 (or 19993 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 12728241 is about 3567.6660437883. Note that the first 3 decimals coincide. The cubic root of 12728241 is about 233.4834650593.

The spelling of 12728241 in words is "twelve million, seven hundred twenty-eight thousand, two hundred forty-one".