13404143 has 4 divisors (see below), whose sum is σ = 14192640. Its totient is φ = 12615648.

The previous prime is 13404137. The next prime is 13404163. The reversal of 13404143 is 34140431.

It is a happy number.

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 13404143 - 2¹⁰ = 13403119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13404133) 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, 394223 + ... + 394256.

It is an arithmetic number, because the mean of its divisors is an integer number (3548160).

Almost surely, 2^13404143 is an apocalyptic number.

13404143 is a deficient number, since it is larger than the sum of its proper divisors (788497).

13404143 is an equidigital number, since it uses as much as digits as its factorization.

13404143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788496.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 13404143 is about 3661.1668904872. The cubic root of 13404143 is about 237.5452501039.

Adding to 13404143 its reverse (34140431), we get a palindrome (47544574).

The spelling of 13404143 in words is "thirteen million, four hundred four thousand, one hundred forty-three".