12772721 has 8 divisors (see below), whose sum is σ = 13890240. Its totient is φ = 11674512.

The previous prime is 12772717. The next prime is 12772757. The reversal of 12772721 is 12727721.

12772721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12772721 - 2² = 12772717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12702721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3431 + ... + 6108.

It is an arithmetic number, because the mean of its divisors is an integer number (1736280).

Almost surely, 2^12772721 is an apocalyptic number.

It is an amenable number.

12772721 is a deficient number, since it is larger than the sum of its proper divisors (1117519).

12772721 is a wasteful number, since it uses less digits than its factorization.

12772721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9655.

The product of its digits is 2744, while the sum is 29.

The square root of 12772721 is about 3573.8943744884. The cubic root of 12772721 is about 233.7551252844.

The spelling of 12772721 in words is "twelve million, seven hundred seventy-two thousand, seven hundred twenty-one".