12161143 has 8 divisors (see below), whose sum is σ = 12534416. Its totient is φ = 11793600.

The previous prime is 12161141. The next prime is 12161153. The reversal of 12161143 is 34116121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12161143 - 2¹ = 12161141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12161143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12161141) 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 in 7 ways as a sum of consecutive naturals, for example, 3088 + ... + 5818.

It is an arithmetic number, because the mean of its divisors is an integer number (1566802).

Almost surely, 2^12161143 is an apocalyptic number.

12161143 is a deficient number, since it is larger than the sum of its proper divisors (373273).

12161143 is an equidigital number, since it uses as much as digits as its factorization.

12161143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2865.

The product of its digits is 144, while the sum is 19.

The square root of 12161143 is about 3487.2830398464. The cubic root of 12161143 is about 229.9630879642.

Adding to 12161143 its reverse (34116121), we get a palindrome (46277264).

The spelling of 12161143 in words is "twelve million, one hundred sixty-one thousand, one hundred forty-three".