12143811 has 8 divisors (see below), whose sum is σ = 16209424. Its totient is φ = 8087040.

The previous prime is 12143809. The next prime is 12143843. The reversal of 12143811 is 11834121.

It is a happy number.

12143811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12143811 - 2¹ = 12143809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12143851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2331 + ... + 5451.

It is an arithmetic number, because the mean of its divisors is an integer number (2026178).

Almost surely, 2^12143811 is an apocalyptic number.

12143811 is a deficient number, since it is larger than the sum of its proper divisors (4065613).

12143811 is a wasteful number, since it uses less digits than its factorization.

12143811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4421.

The product of its digits is 192, while the sum is 21.

The square root of 12143811 is about 3484.7971246545. The cubic root of 12143811 is about 229.8537886104.

Adding to 12143811 its reverse (11834121), we get a palindrome (23977932).

The spelling of 12143811 in words is "twelve million, one hundred forty-three thousand, eight hundred eleven".