11785921 has 12 divisors (see below), whose sum is σ = 14154240. Its totient is φ = 9775080.

The previous prime is 11785889. The next prime is 11785933. The reversal of 11785921 is 12958711.

It is a happy number.

It is not a de Polignac number, because 11785921 - 2⁵ = 11785889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11785951) 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 11 ways as a sum of consecutive naturals, for example, 2361 + ... + 5398.

It is an arithmetic number, because the mean of its divisors is an integer number (1179520).

Almost surely, 2^11785921 is an apocalyptic number.

It is an amenable number.

11785921 is a deficient number, since it is larger than the sum of its proper divisors (2368319).

11785921 is an equidigital number, since it uses as much as digits as its factorization.

11785921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7804 (or 7797 counting only the distinct ones).

The product of its digits is 5040, while the sum is 34.

The square root of 11785921 is about 3433.0629181534. The cubic root of 11785921 is about 227.5732308628.

The spelling of 11785921 in words is "eleven million, seven hundred eighty-five thousand, nine hundred twenty-one".