1804425 has 36 divisors (see below), whose sum is σ = 3477456. Its totient is φ = 823200.

The previous prime is 1804421. The next prime is 1804433. The reversal of 1804425 is 5244081.

It is not a de Polignac number, because 1804425 - 2² = 1804421 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1804395 and 1804404.

It is not an unprimeable number, because it can be changed into a prime (1804421) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3430 + ... + 3920.

It is an arithmetic number, because the mean of its divisors is an integer number (96596).

2^1804425 is an apocalyptic number.

1804425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1804425 is a deficient number, since it is larger than the sum of its proper divisors (1673031).

1804425 is a wasteful number, since it uses less digits than its factorization.

1804425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518 (or 506 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 1804425 is about 1343.2888743677. The cubic root of 1804425 is about 121.7436388729.

The spelling of 1804425 in words is "one million, eight hundred four thousand, four hundred twenty-five".