1804165 has 8 divisors (see below), whose sum is σ = 2361888. Its totient is φ = 1312080.

The previous prime is 1804139. The next prime is 1804199. The reversal of 1804165 is 5614081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1804165 - 2⁵ = 1804133 is a prime.

It is a super-2 number, since 2×1804165² = 6510022694450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16347 + ... + 16456.

It is an arithmetic number, because the mean of its divisors is an integer number (295236).

2^1804165 is an apocalyptic number.

It is an amenable number.

1804165 is a deficient number, since it is larger than the sum of its proper divisors (557723).

1804165 is a wasteful number, since it uses less digits than its factorization.

1804165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32819.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 1804165 is about 1343.1920934848. The cubic root of 1804165 is about 121.7377912360.

It can be divided in two parts, 180 and 4165, that multiplied together give a triangular number (749700 = T₁₂₂₄).

The spelling of 1804165 in words is "one million, eight hundred four thousand, one hundred sixty-five".