11143421 has 2 divisors, whose sum is σ = 11143422. Its totient is φ = 11143420.

The previous prime is 11143417. The next prime is 11143427. The reversal of 11143421 is 12434111.

It is a happy number.

11143421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9084196 + 2059225 = 3014^2 + 1435^2 .

It is a cyclic number.

It is not a de Polignac number, because 11143421 - 2² = 11143417 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11143421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11143427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5571710 + 5571711.

It is an arithmetic number, because the mean of its divisors is an integer number (5571711).

Almost surely, 2^11143421 is an apocalyptic number.

It is an amenable number.

11143421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11143421 is an equidigital number, since it uses as much as digits as its factorization.

11143421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96, while the sum is 17.

The square root of 11143421 is about 3338.1762985199. The cubic root of 11143421 is about 223.3604004223.

Adding to 11143421 its reverse (12434111), we get a palindrome (23577532).

The spelling of 11143421 in words is "eleven million, one hundred forty-three thousand, four hundred twenty-one".