1311125 has 16 divisors (see below), whose sum is σ = 1735344. Its totient is φ = 985600.

The previous prime is 1311109. The next prime is 1311127. The reversal of 1311125 is 5211131.

It can be written as a sum of positive squares in 8 ways, for example, as 628849 + 682276 = 793^2 + 826^2 .

It is not a de Polignac number, because 1311125 - 2⁴ = 1311109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1817 + ... + 2433.

It is an arithmetic number, because the mean of its divisors is an integer number (108459).

2^1311125 is an apocalyptic number.

It is an amenable number.

1311125 is a deficient number, since it is larger than the sum of its proper divisors (424219).

1311125 is an equidigital number, since it uses as much as digits as its factorization.

1311125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649 (or 639 counting only the distinct ones).

The product of its digits is 30, while the sum is 14.

The square root of 1311125 is about 1145.0436672896. The cubic root of 1311125 is about 109.4497312406.

Adding to 1311125 its reverse (5211131), we get a palindrome (6522256).

The spelling of 1311125 in words is "one million, three hundred eleven thousand, one hundred twenty-five".