1311520004 has 12 divisors (see below), whose sum is σ = 2297995728. Its totient is φ = 654949800.

The previous prime is 1311520003. The next prime is 1311520009. The reversal of 1311520004 is 4000251131.

It is not an unprimeable number, because it can be changed into a prime (1311520003) 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, 198902 + ... + 205389.

It is an arithmetic number, because the mean of its divisors is an integer number (191499644).

Almost surely, 2^1311520004 is an apocalyptic number.

It is an amenable number.

1311520004 is a deficient number, since it is larger than the sum of its proper divisors (986475724).

1311520004 is a wasteful number, since it uses less digits than its factorization.

1311520004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405106 (or 405104 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1311520004 is about 36214.9141100735. The cubic root of 1311520004 is about 1094.6072148204.

Adding to 1311520004 its reverse (4000251131), we get a palindrome (5311771135).

The spelling of 1311520004 in words is "one billion, three hundred eleven million, five hundred twenty thousand, four".