11641921 has 4 divisors (see below), whose sum is σ = 11750832. Its totient is φ = 11533012.

The previous prime is 11641919. The next prime is 11641937. The reversal of 11641921 is 12914611.

11641921 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 a cyclic number.

It is not a de Polignac number, because 11641921 - 2¹ = 11641919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11641901) 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, 54295 + ... + 54508.

It is an arithmetic number, because the mean of its divisors is an integer number (2937708).

Almost surely, 2^11641921 is an apocalyptic number.

It is an amenable number.

11641921 is a deficient number, since it is larger than the sum of its proper divisors (108911).

11641921 is a wasteful number, since it uses less digits than its factorization.

11641921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108910.

The product of its digits is 432, while the sum is 25.

The square root of 11641921 is about 3412.0259377678. The cubic root of 11641921 is about 226.6426029337.

The spelling of 11641921 in words is "eleven million, six hundred forty-one thousand, nine hundred twenty-one".