1311322125 has 16 divisors (see below), whose sum is σ = 2182040640. Its totient is φ = 699371600.

The previous prime is 1311322121. The next prime is 1311322153. The reversal of 1311322125 is 5212231131.

It is not a de Polignac number, because 1311322125 - 2² = 1311322121 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311322121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1748055 + ... + 1748804.

It is an arithmetic number, because the mean of its divisors is an integer number (136377540).

Almost surely, 2^1311322125 is an apocalyptic number.

1311322125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1311322125 is a deficient number, since it is larger than the sum of its proper divisors (870718515).

1311322125 is an equidigital number, since it uses as much as digits as its factorization.

1311322125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3496877 (or 3496867 counting only the distinct ones).

The product of its digits is 360, while the sum is 21.

The square root of 1311322125 is about 36212.1819972230. The cubic root of 1311322125 is about 1094.5521614791.

Adding to 1311322125 its reverse (5212231131), we get a palindrome (6523553256).

The spelling of 1311322125 in words is "one billion, three hundred eleven million, three hundred twenty-two thousand, one hundred twenty-five".