1311386 has 4 divisors (see below), whose sum is σ = 1967082. Its totient is φ = 655692.

The previous prime is 1311383. The next prime is 1311403. The reversal of 1311386 is 6831131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1311025 + 361 = 1145^2 + 19^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1311383) 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 as a sum of consecutive naturals, namely, 327845 + ... + 327848.

2^1311386 is an apocalyptic number.

1311386 is a deficient number, since it is larger than the sum of its proper divisors (655696).

1311386 is an equidigital number, since it uses as much as digits as its factorization.

1311386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655695.

The product of its digits is 432, while the sum is 23.

The square root of 1311386 is about 1145.1576310709. The cubic root of 1311386 is about 109.4569933208.

The spelling of 1311386 in words is "one million, three hundred eleven thousand, three hundred eighty-six".