11339721 has 12 divisors (see below), whose sum is σ = 16689348. Its totient is φ = 7416864.

The previous prime is 11339711. The next prime is 11339743. The reversal of 11339721 is 12793311.

11339721 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 5405625 + 5934096 = 2325^2 + 2436^2 .

It is not a de Polignac number, because 11339721 - 2⁷ = 11339593 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11339711) 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, 11410 + ... + 12363.

It is an arithmetic number, because the mean of its divisors is an integer number (1390779).

Almost surely, 2^11339721 is an apocalyptic number.

It is an amenable number.

11339721 is a deficient number, since it is larger than the sum of its proper divisors (5349627).

11339721 is a wasteful number, since it uses less digits than its factorization.

11339721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23832 (or 23829 counting only the distinct ones).

The product of its digits is 1134, while the sum is 27.

The square root of 11339721 is about 3367.4502223492. The cubic root of 11339721 is about 224.6643291011.

The spelling of 11339721 in words is "eleven million, three hundred thirty-nine thousand, seven hundred twenty-one".