1812904 has 16 divisors (see below), whose sum is σ = 3578400. Its totient is φ = 858672.

The previous prime is 1812871. The next prime is 1812907. The reversal of 1812904 is 4092181.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812907) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5812 + ... + 6115.

It is an arithmetic number, because the mean of its divisors is an integer number (223650).

2^1812904 is an apocalyptic number.

It is an amenable number.

1812904 is a deficient number, since it is larger than the sum of its proper divisors (1765496).

1812904 is a wasteful number, since it uses less digits than its factorization.

1812904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11952 (or 11948 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 1812904 is about 1346.4412352569. The cubic root of 1812904 is about 121.9340322393.

The spelling of 1812904 in words is "one million, eight hundred twelve thousand, nine hundred four".