11170921 has 4 divisors (see below), whose sum is σ = 11828052. Its totient is φ = 10513792.

The previous prime is 11170877. The next prime is 11170933. The reversal of 11170921 is 12907111.

11170921 is digitally balanced in base 2, 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.

It can be written as a sum of positive squares in 2 ways, for example, as 9241600 + 1929321 = 3040^2 + 1389^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11170921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11170892 and 11170901.

It is not an unprimeable number, because it can be changed into a prime (11170981) 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, 328540 + ... + 328573.

It is an arithmetic number, because the mean of its divisors is an integer number (2957013).

Almost surely, 2^11170921 is an apocalyptic number.

It is an amenable number.

11170921 is a deficient number, since it is larger than the sum of its proper divisors (657131).

11170921 is an equidigital number, since it uses as much as digits as its factorization.

11170921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657130.

The product of its (nonzero) digits is 126, while the sum is 22.

The square root of 11170921 is about 3342.2927759249. The cubic root of 11170921 is about 223.5439875252.

The spelling of 11170921 in words is "eleven million, one hundred seventy thousand, nine hundred twenty-one".