11057921 has 4 divisors (see below), whose sum is σ = 12637632. Its totient is φ = 9478212.

The previous prime is 11057909. The next prime is 11057927. The reversal of 11057921 is 12975011.

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 11057921 - 2¹⁰ = 11056897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11057927) 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, 789845 + ... + 789858.

It is an arithmetic number, because the mean of its divisors is an integer number (3159408).

Almost surely, 2^11057921 is an apocalyptic number.

It is an amenable number.

11057921 is a deficient number, since it is larger than the sum of its proper divisors (1579711).

11057921 is an equidigital number, since it uses as much as digits as its factorization.

11057921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1579710.

The product of its (nonzero) digits is 630, while the sum is 26.

The square root of 11057921 is about 3325.3452452339. The cubic root of 11057921 is about 222.7876748627.

The spelling of 11057921 in words is "eleven million, fifty-seven thousand, nine hundred twenty-one".