1311145 has 16 divisors (see below), whose sum is σ = 1774080. Its totient is φ = 921600.

The previous prime is 1311143. The next prime is 1311173. The reversal of 1311145 is 5411131.

It is not a de Polignac number, because 1311145 - 2¹ = 1311143 is a prime.

It is a super-2 number, since 2×1311145² = 3438202422050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1311143) 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, 1321 + ... + 2089.

It is an arithmetic number, because the mean of its divisors is an integer number (110880).

2^1311145 is an apocalyptic number.

It is an amenable number.

1311145 is a deficient number, since it is larger than the sum of its proper divisors (462935).

1311145 is a wasteful number, since it uses less digits than its factorization.

1311145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816.

The product of its digits is 60, while the sum is 16.

The square root of 1311145 is about 1145.0524005477. The cubic root of 1311145 is about 109.4502877560.

Adding to 1311145 its reverse (5411131), we get a palindrome (6722276).

The spelling of 1311145 in words is "one million, three hundred eleven thousand, one hundred forty-five".