1311540424 has 8 divisors (see below), whose sum is σ = 2459138310. Its totient is φ = 655770208.

The previous prime is 1311540421. The next prime is 1311540427. The reversal of 1311540424 is 4240451131.

It is an interprime number because it is at equal distance from previous prime (1311540421) and next prime (1311540427).

It can be written as a sum of positive squares in only one way, i.e., 1112222500 + 199317924 = 33350^2 + 14118^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1311540421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81971269 + ... + 81971284.

Almost surely, 2^1311540424 is an apocalyptic number.

It is an amenable number.

1311540424 is a deficient number, since it is larger than the sum of its proper divisors (1147597886).

1311540424 is a wasteful number, since it uses less digits than its factorization.

1311540424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163942559 (or 163942555 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 1311540424 is about 36215.1960370229. The cubic root of 1311540424 is about 1094.6128957004.

Adding to 1311540424 its reverse (4240451131), we get a palindrome (5551991555).

The spelling of 1311540424 in words is "one billion, three hundred eleven million, five hundred forty thousand, four hundred twenty-four".