12409143 has 4 divisors (see below), whose sum is σ = 16545528. Its totient is φ = 8272760.

The previous prime is 12409141. The next prime is 12409151. The reversal of 12409143 is 34190421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12409143 - 2¹ = 12409141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12409141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2068188 + ... + 2068193.

It is an arithmetic number, because the mean of its divisors is an integer number (4136382).

Almost surely, 2^12409143 is an apocalyptic number.

12409143 is a deficient number, since it is larger than the sum of its proper divisors (4136385).

12409143 is an equidigital number, since it uses as much as digits as its factorization.

12409143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4136384.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 12409143 is about 3522.6613518759. The cubic root of 12409143 is about 231.5157793467.

Adding to 12409143 its reverse (34190421), we get a palindrome (46599564).

The spelling of 12409143 in words is "twelve million, four hundred nine thousand, one hundred forty-three".