11164421 has 4 divisors (see below), whose sum is σ = 11239500. Its totient is φ = 11089344.

The previous prime is 11164379. The next prime is 11164429. The reversal of 11164421 is 12446111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12446111 = 1637 ⋅7603.

It can be written as a sum of positive squares in 2 ways, for example, as 6708100 + 4456321 = 2590^2 + 2111^2 .

It is a cyclic number.

It is not a de Polignac number, because 11164421 - 2⁶ = 11164357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11164393 and 11164402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11164429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37316 + ... + 37613.

It is an arithmetic number, because the mean of its divisors is an integer number (2809875).

Almost surely, 2^11164421 is an apocalyptic number.

It is an amenable number.

11164421 is a deficient number, since it is larger than the sum of its proper divisors (75079).

11164421 is an equidigital number, since it uses as much as digits as its factorization.

11164421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75078.

The product of its digits is 192, while the sum is 20.

The square root of 11164421 is about 3341.3202480457. The cubic root of 11164421 is about 223.5006214251.

The spelling of 11164421 in words is "eleven million, one hundred sixty-four thousand, four hundred twenty-one".