11894821 has 4 divisors (see below), whose sum is σ = 11918700. Its totient is φ = 11870944.

The previous prime is 11894809. The next prime is 11894833. The reversal of 11894821 is 12849811.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (11894809) and next prime (11894833).

It can be written as a sum of positive squares in 2 ways, for example, as 5336100 + 6558721 = 2310^2 + 2561^2 .

It is a cyclic number.

It is not a de Polignac number, because 11894821 - 2¹¹ = 11892773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11894801) 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, 11176 + ... + 12193.

It is an arithmetic number, because the mean of its divisors is an integer number (2979675).

Almost surely, 2^11894821 is an apocalyptic number.

It is an amenable number.

11894821 is a deficient number, since it is larger than the sum of its proper divisors (23879).

11894821 is an equidigital number, since it uses as much as digits as its factorization.

11894821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23878.

The product of its digits is 4608, while the sum is 34.

The square root of 11894821 is about 3448.8869218923. The cubic root of 11894821 is about 228.2719963590.

The spelling of 11894821 in words is "eleven million, eight hundred ninety-four thousand, eight hundred twenty-one".