11684521 has 2 divisors, whose sum is σ = 11684522. Its totient is φ = 11684520.

The previous prime is 11684513. The next prime is 11684567. The reversal of 11684521 is 12548611.

It is the 1396-th star number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7728400 + 3956121 = 2780^2 + 1989^2 .

It is a cyclic number.

It is not a de Polignac number, because 11684521 - 2³ = 11684513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11684521.

It is not a weakly prime, because it can be changed into another prime (11684501) 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 as a sum of consecutive naturals, namely, 5842260 + 5842261.

It is an arithmetic number, because the mean of its divisors is an integer number (5842261).

Almost surely, 2^11684521 is an apocalyptic number.

It is an amenable number.

11684521 is a deficient number, since it is larger than the sum of its proper divisors (1).

11684521 is an equidigital number, since it uses as much as digits as its factorization.

11684521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 28.

The square root of 11684521 is about 3418.2628629174. The cubic root of 11684521 is about 226.9187092081.

The spelling of 11684521 in words is "eleven million, six hundred eighty-four thousand, five hundred twenty-one".