11143871 has 2 divisors, whose sum is σ = 11143872. Its totient is φ = 11143870.

The previous prime is 11143817. The next prime is 11143877. The reversal of 11143871 is 17834111.

Together with previous prime (11143817) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11143871 - 2¹⁰ = 11142847 is a prime.

It is a Chen prime.

It is equal to p₇₃₅₃₇₁ and since 11143871 and 735371 have the same sum of digits, it is a Honaker prime.

It is a zygodrome in base 4.

It is a self number, because there is not a number n which added to its sum of digits gives 11143871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11143877) 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, 5571935 + 5571936.

It is an arithmetic number, because the mean of its divisors is an integer number (5571936).

Almost surely, 2^11143871 is an apocalyptic number.

11143871 is a deficient number, since it is larger than the sum of its proper divisors (1).

11143871 is an equidigital number, since it uses as much as digits as its factorization.

11143871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 26.

The square root of 11143871 is about 3338.2436999117. The cubic root of 11143871 is about 223.3634070043.

Adding to 11143871 its reverse (17834111), we get a palindrome (28977982).

The spelling of 11143871 in words is "eleven million, one hundred forty-three thousand, eight hundred seventy-one".