1804239 has 12 divisors (see below), whose sum is σ = 2618616. Its totient is φ = 1197072.

The previous prime is 1804219. The next prime is 1804249. The reversal of 1804239 is 9324081.

It is not a de Polignac number, because 1804239 - 2⁵ = 1804207 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1804219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2437 + ... + 3089.

It is an arithmetic number, because the mean of its divisors is an integer number (218218).

2^1804239 is an apocalyptic number.

1804239 is a deficient number, since it is larger than the sum of its proper divisors (814377).

1804239 is a wasteful number, since it uses less digits than its factorization.

1804239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966 (or 963 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1804239 is about 1343.2196395229. The cubic root of 1804239 is about 121.7394556206.

It can be divided in two parts, 18042 and 39, that added together give a palindrome (18081).

The spelling of 1804239 in words is "one million, eight hundred four thousand, two hundred thirty-nine".