1805233 has 4 divisors (see below), whose sum is σ = 1839348. Its totient is φ = 1771120.

The previous prime is 1805231. The next prime is 1805239. The reversal of 1805233 is 3325081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3325081 = 17 ⋅195593.

It can be written as a sum of positive squares in 2 ways, for example, as 431649 + 1373584 = 657^2 + 1172^2 .

It is a cyclic number.

It is not a de Polignac number, because 1805233 - 2¹ = 1805231 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

1805233 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1805231) 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, 16978 + ... + 17083.

It is an arithmetic number, because the mean of its divisors is an integer number (459837).

2^1805233 is an apocalyptic number.

It is an amenable number.

1805233 is a deficient number, since it is larger than the sum of its proper divisors (34115).

1805233 is an equidigital number, since it uses as much as digits as its factorization.

1805233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34114.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1805233 is about 1343.5895950773. The cubic root of 1805233 is about 121.7618079445.

The spelling of 1805233 in words is "one million, eight hundred five thousand, two hundred thirty-three".