1311795 has 40 divisors (see below), whose sum is σ = 2439360. Its totient is φ = 673920.

The previous prime is 1311773. The next prime is 1311797. The reversal of 1311795 is 5971131.

It is a happy number.

It is not a de Polignac number, because 1311795 - 2¹¹ = 1309747 is a prime.

It is a super-2 number, since 2×1311795² = 3441612244050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311797) 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 39 ways as a sum of consecutive naturals, for example, 16566 + ... + 16644.

It is an arithmetic number, because the mean of its divisors is an integer number (60984).

2^1311795 is an apocalyptic number.

1311795 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1311795 is a deficient number, since it is larger than the sum of its proper divisors (1127565).

1311795 is an equidigital number, since it uses as much as digits as its factorization.

1311795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137 (or 128 counting only the distinct ones).

The product of its digits is 945, while the sum is 27.

The square root of 1311795 is about 1145.3361951846. The cubic root of 1311795 is about 109.4683714243.

The spelling of 1311795 in words is "one million, three hundred eleven thousand, seven hundred ninety-five".