11485721 has 4 divisors (see below), whose sum is σ = 12369252. Its totient is φ = 10602192.

The previous prime is 11485703. The next prime is 11485723. The reversal of 11485721 is 12758411.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1651225 + 9834496 = 1285^2 + 3136^2 .

It is a cyclic number.

It is not a de Polignac number, because 11485721 - 2¹⁸ = 11223577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11485723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 441746 + ... + 441771.

It is an arithmetic number, because the mean of its divisors is an integer number (3092313).

Almost surely, 2^11485721 is an apocalyptic number.

It is an amenable number.

11485721 is a deficient number, since it is larger than the sum of its proper divisors (883531).

11485721 is an equidigital number, since it uses as much as digits as its factorization.

11485721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883530.

The product of its digits is 2240, while the sum is 29.

The square root of 11485721 is about 3389.0590139447. The cubic root of 11485721 is about 225.6244120528.

The spelling of 11485721 in words is "eleven million, four hundred eighty-five thousand, seven hundred twenty-one".