11421143 has 2 divisors, whose sum is σ = 11421144. Its totient is φ = 11421142.

The previous prime is 11421121. The next prime is 11421149. The reversal of 11421143 is 34112411.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (34112411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11421143 - 2⁶ = 11421079 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11421149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5710571 + 5710572.

It is an arithmetic number, because the mean of its divisors is an integer number (5710572).

Almost surely, 2^11421143 is an apocalyptic number.

11421143 is a deficient number, since it is larger than the sum of its proper divisors (1).

11421143 is an equidigital number, since it uses as much as digits as its factorization.

11421143 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 11421143 is about 3379.5181609218. The cubic root of 11421143 is about 225.2007623748.

Adding to 11421143 its reverse (34112411), we get a palindrome (45533554).

The spelling of 11421143 in words is "eleven million, four hundred twenty-one thousand, one hundred forty-three".