1641806 has 8 divisors (see below), whose sum is σ = 2547720. Its totient is φ = 792568.

The previous prime is 1641799. The next prime is 1641811. The reversal of 1641806 is 6081461.

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, 14096 + ... + 14211.

It is an arithmetic number, because the mean of its divisors is an integer number (318465).

2^1641806 is an apocalyptic number.

1641806 is a deficient number, since it is larger than the sum of its proper divisors (905914).

1641806 is a wasteful number, since it uses less digits than its factorization.

1641806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28338.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 1641806 is about 1281.3297780041. The cubic root of 1641806 is about 117.9706428932.

The spelling of 1641806 in words is "one million, six hundred forty-one thousand, eight hundred six".