1311906 has 8 divisors (see below), whose sum is σ = 2623824. Its totient is φ = 437300.

The previous prime is 1311901. The next prime is 1311917. The reversal of 1311906 is 6091131.

It is a happy number.

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

1311906 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1311901) 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, 109320 + ... + 109331.

It is an arithmetic number, because the mean of its divisors is an integer number (327978).

2^1311906 is an apocalyptic number.

1311906 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311906 is a wasteful number, since it uses less digits than its factorization.

1311906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218656.

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 1311906 is about 1145.3846515472. The cubic root of 1311906 is about 109.4714589612.

The spelling of 1311906 in words is "one million, three hundred eleven thousand, nine hundred six".