11652721 has 4 divisors (see below), whose sum is σ = 11718000. Its totient is φ = 11587444.

The previous prime is 11652713. The next prime is 11652727. The reversal of 11652721 is 12725611.

11652721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11652721 - 2³ = 11652713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11652727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32371 + ... + 32728.

It is an arithmetic number, because the mean of its divisors is an integer number (2929500).

Almost surely, 2^11652721 is an apocalyptic number.

It is an amenable number.

11652721 is a deficient number, since it is larger than the sum of its proper divisors (65279).

11652721 is an equidigital number, since it uses as much as digits as its factorization.

11652721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65278.

The product of its digits is 840, while the sum is 25.

The square root of 11652721 is about 3413.6082083332. The cubic root of 11652721 is about 226.7126653570.

The spelling of 11652721 in words is "eleven million, six hundred fifty-two thousand, seven hundred twenty-one".