11972143 has 2 divisors, whose sum is σ = 11972144. Its totient is φ = 11972142.

The previous prime is 11972141. The next prime is 11972153. The reversal of 11972143 is 34127911.

11972143 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (34127911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11972143 - 2¹ = 11972141 is a prime.

Together with 11972141, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11972141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5986071 + 5986072.

It is an arithmetic number, because the mean of its divisors is an integer number (5986072).

Almost surely, 2^11972143 is an apocalyptic number.

11972143 is a deficient number, since it is larger than the sum of its proper divisors (1).

11972143 is an equidigital number, since it uses as much as digits as its factorization.

11972143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 28.

The square root of 11972143 is about 3460.0784673183. The cubic root of 11972143 is about 228.7655540003.

The spelling of 11972143 in words is "eleven million, nine hundred seventy-two thousand, one hundred forty-three".