11421749 has 2 divisors, whose sum is σ = 11421750. Its totient is φ = 11421748.

The previous prime is 11421721. The next prime is 11421757. The reversal of 11421749 is 94712411.

11421749 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., 8514724 + 2907025 = 2918^2 + 1705^2 .

It is an emirp because it is prime and its reverse (94712411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11421749 - 2²⁰ = 10373173 is a prime.

It is equal to p₇₅₂₄₇₄ and since 11421749 and 752474 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11421779) 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 as a sum of consecutive naturals, namely, 5710874 + 5710875.

It is an arithmetic number, because the mean of its divisors is an integer number (5710875).

Almost surely, 2^11421749 is an apocalyptic number.

It is an amenable number.

11421749 is a deficient number, since it is larger than the sum of its proper divisors (1).

11421749 is an equidigital number, since it uses as much as digits as its factorization.

11421749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 29.

The square root of 11421749 is about 3379.6078174842. The cubic root of 11421749 is about 225.2047453168.

The spelling of 11421749 in words is "eleven million, four hundred twenty-one thousand, seven hundred forty-nine".