1405804 has 12 divisors (see below), whose sum is σ = 2545200. Its totient is φ = 678608.

The previous prime is 1405801. The next prime is 1405813. The reversal of 1405804 is 4085041.

It is not an unprimeable number, because it can be changed into a prime (1405801) 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, 5944 + ... + 6175.

It is an arithmetic number, because the mean of its divisors is an integer number (212100).

2^1405804 is an apocalyptic number.

It is an amenable number.

1405804 is a deficient number, since it is larger than the sum of its proper divisors (1139396).

1405804 is a wasteful number, since it uses less digits than its factorization.

1405804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12152 (or 12150 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 1405804 is about 1185.6660575390. Note that the first 3 decimals coincide. The cubic root of 1405804 is about 112.0232732248.

It can be divided in two parts, 1405 and 804, that added together give a square (2209 = 47²).

The spelling of 1405804 in words is "one million, four hundred five thousand, eight hundred four".