1805841 has 8 divisors (see below), whose sum is σ = 2675360. Its totient is φ = 1203876.

The previous prime is 1805833. The next prime is 1805857. The reversal of 1805841 is 1485081.

1805841 is a `hidden beast` number, since 1 + 80 + 584 + 1 = 666.

It is not a de Polignac number, because 1805841 - 2³ = 1805833 is a prime.

It is a super-2 number, since 2×1805841² = 6522123434562, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 66883 = 1805841 / (1 + 8 + 0 + 5 + 8 + 4 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1805821) 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, 33415 + ... + 33468.

It is an arithmetic number, because the mean of its divisors is an integer number (334420).

2^1805841 is an apocalyptic number.

It is an amenable number.

1805841 is a deficient number, since it is larger than the sum of its proper divisors (869519).

1805841 is an equidigital number, since it uses as much as digits as its factorization.

1805841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66892 (or 66886 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 1805841 is about 1343.8158355965. The cubic root of 1805841 is about 121.7754761468.

The spelling of 1805841 in words is "one million, eight hundred five thousand, eight hundred forty-one".