1311132625 has 16 divisors (see below), whose sum is σ = 1785049344. Its totient is φ = 953550000.

The previous prime is 1311132619. The next prime is 1311132649. The reversal of 1311132625 is 5262311131.

It is a happy number.

It is not a de Polignac number, because 1311132625 - 2³ = 1311132617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

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 1311132625.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 475401 + ... + 478150.

It is an arithmetic number, because the mean of its divisors is an integer number (111565584).

Almost surely, 2^1311132625 is an apocalyptic number.

It is an amenable number.

1311132625 is a deficient number, since it is larger than the sum of its proper divisors (473916719).

1311132625 is an equidigital number, since it uses as much as digits as its factorization.

1311132625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953577 (or 953567 counting only the distinct ones).

The product of its digits is 1080, while the sum is 25.

The square root of 1311132625 is about 36209.5653798827. The cubic root of 1311132625 is about 1094.4994341279.

Adding to 1311132625 its reverse (5262311131), we get a palindrome (6573443756).

The spelling of 1311132625 in words is "one billion, three hundred eleven million, one hundred thirty-two thousand, six hundred twenty-five".