1311406 has 8 divisors (see below), whose sum is σ = 1977984. Its totient is φ = 652080.

The previous prime is 1311403. The next prime is 1311407. The reversal of 1311406 is 6041131.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1311406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1335 + ... + 2098.

It is an arithmetic number, because the mean of its divisors is an integer number (247248).

2^1311406 is an apocalyptic number.

1311406 is a deficient number, since it is larger than the sum of its proper divisors (666578).

1311406 is a wasteful number, since it uses less digits than its factorization.

1311406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3626.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1311406 is about 1145.1663634599. The cubic root of 1311406 is about 109.4575497623.

Subtracting from 1311406 its sum of digits (16), we obtain a triangular number (1311390 = T₁₆₁₉).

Adding to 1311406 its reverse (6041131), we get a palindrome (7352537).

The spelling of 1311406 in words is "one million, three hundred eleven thousand, four hundred six".