13052721 has 8 divisors (see below), whose sum is σ = 18985824. Its totient is φ = 7910720.

The previous prime is 13052717. The next prime is 13052723. The reversal of 13052721 is 12725031.

13052721 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 13052721 - 2² = 13052717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13052723) 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, 197736 + ... + 197801.

It is an arithmetic number, because the mean of its divisors is an integer number (2373228).

Almost surely, 2^13052721 is an apocalyptic number.

13052721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13052721 is a deficient number, since it is larger than the sum of its proper divisors (5933103).

13052721 is a wasteful number, since it uses less digits than its factorization.

13052721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395551.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 13052721 is about 3612.8549652595. The cubic root of 13052721 is about 235.4508982966.

Adding to 13052721 its reverse (12725031), we get a palindrome (25777752).

The spelling of 13052721 in words is "thirteen million, fifty-two thousand, seven hundred twenty-one".