1311361 has 4 divisors (see below), whose sum is σ = 1380400. Its totient is φ = 1242324.

The previous prime is 1311353. The next prime is 1311367. The reversal of 1311361 is 1631131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1311361 - 2³ = 1311353 is a prime.

It is a Duffinian number.

1311361 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1311367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34491 + ... + 34528.

It is an arithmetic number, because the mean of its divisors is an integer number (345100).

2^1311361 is an apocalyptic number.

It is an amenable number.

1311361 is a deficient number, since it is larger than the sum of its proper divisors (69039).

1311361 is an equidigital number, since it uses as much as digits as its factorization.

1311361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69038.

The product of its digits is 54, while the sum is 16.

The square root of 1311361 is about 1145.1467154911. The cubic root of 1311361 is about 109.4562977610.

Adding to 1311361 its reverse (1631131), we get a palindrome (2942492).

The spelling of 1311361 in words is "one million, three hundred eleven thousand, three hundred sixty-one".