1311540425 has 24 divisors (see below), whose sum is σ = 1757142744. Its totient is φ = 965352960.

The previous prime is 1311540421. The next prime is 1311540427. The reversal of 1311540425 is 5240451131.

It can be written as a sum of positive squares in 12 ways, for example, as 965282761 + 346257664 = 31069^2 + 18608^2 .

It is not a de Polignac number, because 1311540425 - 2² = 1311540421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1311540394 and 1311540403.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95279 + ... + 108171.

It is an arithmetic number, because the mean of its divisors is an integer number (73214281).

Almost surely, 2^1311540425 is an apocalyptic number.

It is an amenable number.

1311540425 is a deficient number, since it is larger than the sum of its proper divisors (445602319).

1311540425 is a wasteful number, since it uses less digits than its factorization.

1311540425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13229 (or 13224 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1311540425 is about 36215.1960508293. The cubic root of 1311540425 is about 1094.6128959786.

Adding to 1311540425 its reverse (5240451131), we get a palindrome (6551991556).

The spelling of 1311540425 in words is "one billion, three hundred eleven million, five hundred forty thousand, four hundred twenty-five".