1311204401 has 16 divisors (see below), whose sum is σ = 1476338304. Its totient is φ = 1155458304.

The previous prime is 1311204397. The next prime is 1311204443. The reversal of 1311204401 is 1044021131.

It is a happy number.

It is not a de Polignac number, because 1311204401 - 2² = 1311204397 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 1311204401.

It is not an unprimeable number, because it can be changed into a prime (1311204481) 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, 159545 + ... + 167561.

It is an arithmetic number, because the mean of its divisors is an integer number (92271144).

Almost surely, 2^1311204401 is an apocalyptic number.

It is an amenable number.

1311204401 is a deficient number, since it is larger than the sum of its proper divisors (165133903).

1311204401 is a wasteful number, since it uses less digits than its factorization.

1311204401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8600.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1311204401 is about 36210.5564856438. The cubic root of 1311204401 is about 1094.5194060098.

Adding to 1311204401 its reverse (1044021131), we get a palindrome (2355225532).

The spelling of 1311204401 in words is "one billion, three hundred eleven million, two hundred four thousand, four hundred one".