1331806 has 16 divisors (see below), whose sum is σ = 2298240. Its totient is φ = 567000.

The previous prime is 1331801. The next prime is 1331821. The reversal of 1331806 is 6081331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3325 + ... + 3703.

It is an arithmetic number, because the mean of its divisors is an integer number (143640).

2^1331806 is an apocalyptic number.

1331806 is a deficient number, since it is larger than the sum of its proper divisors (966434).

1331806 is a wasteful number, since it uses less digits than its factorization.

1331806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1331806 is about 1154.0389941419. The cubic root of 1331806 is about 110.0221993763.

The spelling of 1331806 in words is "one million, three hundred thirty-one thousand, eight hundred six".