1311806 has 8 divisors (see below), whose sum is σ = 2001240. Its totient is φ = 644728.

The previous prime is 1311799. The next prime is 1311829. The reversal of 1311806 is 6081131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5441 + ... + 5676.

It is an arithmetic number, because the mean of its divisors is an integer number (250155).

2^1311806 is an apocalyptic number.

1311806 is a deficient number, since it is larger than the sum of its proper divisors (689434).

1311806 is a wasteful number, since it uses less digits than its factorization.

1311806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11178.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1311806 is about 1145.3409972580. The cubic root of 1311806 is about 109.4686774042.

Adding to 1311806 its reverse (6081131), we get a palindrome (7392937).

The spelling of 1311806 in words is "one million, three hundred eleven thousand, eight hundred six".