1311065 has 16 divisors (see below), whose sum is σ = 1838592. Its totient is φ = 878784.

The previous prime is 1311053. The next prime is 1311067. The reversal of 1311065 is 5601131.

It is a cyclic number.

It is not a de Polignac number, because 1311065 - 2⁶ = 1311001 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311067) 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, 1247 + ... + 2043.

It is an arithmetic number, because the mean of its divisors is an integer number (114912).

2^1311065 is an apocalyptic number.

It is an amenable number.

1311065 is a deficient number, since it is larger than the sum of its proper divisors (527527).

1311065 is an equidigital number, since it uses as much as digits as its factorization.

1311065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 1311065 is about 1145.0174671157. The cubic root of 1311065 is about 109.4480616607.

Adding to 1311065 its reverse (5601131), we get a palindrome (6912196).

The spelling of 1311065 in words is "one million, three hundred eleven thousand, sixty-five".