1311543125 has 30 divisors (see below), whose sum is σ = 1701744330. Its totient is φ = 1009288000.

The previous prime is 1311543113. The next prime is 1311543139. The reversal of 1311543125 is 5213451131.

It can be written as a sum of positive squares in 15 ways, for example, as 1108024369 + 203518756 = 33287^2 + 14266^2 .

It is not a de Polignac number, because 1311543125 - 2¹⁰ = 1311542101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1311543094 and 1311543103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 4875491 + ... + 4875759.

It is an arithmetic number, because the mean of its divisors is an integer number (56724811).

Almost surely, 2^1311543125 is an apocalyptic number.

It is an amenable number.

1311543125 is a deficient number, since it is larger than the sum of its proper divisors (390201205).

1311543125 is an frugal number, since it uses more digits than its factorization.

1311543125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587 (or 303 counting only the distinct ones).

The product of its digits is 1800, while the sum is 26.

The square root of 1311543125 is about 36215.2333279795. The cubic root of 1311543125 is about 1094.6136471190.

Adding to 1311543125 its reverse (5213451131), we get a palindrome (6524994256).

The spelling of 1311543125 in words is "one billion, three hundred eleven million, five hundred forty-three thousand, one hundred twenty-five".