1311204423 has 16 divisors (see below), whose sum is σ = 1762489856. Its totient is φ = 867045600.

The previous prime is 1311204397. The next prime is 1311204443. The reversal of 1311204423 is 3244021131.

It is not a de Polignac number, because 1311204423 - 2⁶ = 1311204359 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 1311204423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311204443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 371061 + ... + 374577.

It is an arithmetic number, because the mean of its divisors is an integer number (110155616).

Almost surely, 2^1311204423 is an apocalyptic number.

1311204423 is a deficient number, since it is larger than the sum of its proper divisors (451285433).

1311204423 is a wasteful number, since it uses less digits than its factorization.

1311204423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4494.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1311204423 is about 36210.5567894226. The cubic root of 1311204423 is about 1094.5194121312.

Adding to 1311204423 its reverse (3244021131), we get a palindrome (4555225554).

The spelling of 1311204423 in words is "one billion, three hundred eleven million, two hundred four thousand, four hundred twenty-three".