11783521 has 8 divisors (see below), whose sum is σ = 12331584. Its totient is φ = 11238480.

The previous prime is 11783461. The next prime is 11783573. The reversal of 11783521 is 12538711.

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 11783521 - 2⁷ = 11783393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11783521.

It is not an unprimeable number, because it can be changed into a prime (11781521) 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 7 ways as a sum of consecutive naturals, for example, 11970 + ... + 12916.

It is an arithmetic number, because the mean of its divisors is an integer number (1541448).

Almost surely, 2^11783521 is an apocalyptic number.

It is an amenable number.

11783521 is a deficient number, since it is larger than the sum of its proper divisors (548063).

11783521 is an equidigital number, since it uses as much as digits as its factorization.

11783521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1511.

The product of its digits is 1680, while the sum is 28.

The square root of 11783521 is about 3432.7133582634. The cubic root of 11783521 is about 227.5577826900.

It can be divided in two parts, 117 and 83521, that added together give a palindrome (83638).

The spelling of 11783521 in words is "eleven million, seven hundred eighty-three thousand, five hundred twenty-one".