11842921 has 2 divisors, whose sum is σ = 11842922. Its totient is φ = 11842920.

The previous prime is 11842879. The next prime is 11842927. The reversal of 11842921 is 12924811.

11842921 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11128896 + 714025 = 3336^2 + 845^2 .

It is a cyclic number.

It is not a de Polignac number, because 11842921 - 2⁹ = 11842409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11842921.

It is not a weakly prime, because it can be changed into another prime (11842927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5921460 + 5921461.

It is an arithmetic number, because the mean of its divisors is an integer number (5921461).

Almost surely, 2^11842921 is an apocalyptic number.

It is an amenable number.

11842921 is a deficient number, since it is larger than the sum of its proper divisors (1).

11842921 is an equidigital number, since it uses as much as digits as its factorization.

11842921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 28.

The square root of 11842921 is about 3441.3545298327. The cubic root of 11842921 is about 227.9395102176.

The spelling of 11842921 in words is "eleven million, eight hundred forty-two thousand, nine hundred twenty-one".