11853921 has 4 divisors (see below), whose sum is σ = 15805232. Its totient is φ = 7902612.

The previous prime is 11853899. The next prime is 11853931. The reversal of 11853921 is 12935811.

11853921 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 not a de Polignac number, because 11853921 - 2⁵ = 11853889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11853931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1975651 + ... + 1975656.

It is an arithmetic number, because the mean of its divisors is an integer number (3951308).

Almost surely, 2^11853921 is an apocalyptic number.

It is an amenable number.

11853921 is a deficient number, since it is larger than the sum of its proper divisors (3951311).

11853921 is an equidigital number, since it uses as much as digits as its factorization.

11853921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3951310.

The product of its digits is 2160, while the sum is 30.

The square root of 11853921 is about 3442.9523667922. The cubic root of 11853921 is about 228.0100603440.

The spelling of 11853921 in words is "eleven million, eight hundred fifty-three thousand, nine hundred twenty-one".