1805456 has 20 divisors (see below), whose sum is σ = 3682800. Its totient is φ = 855072.

The previous prime is 1805413. The next prime is 1805473. The reversal of 1805456 is 6545081.

It is a happy number.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2666 + ... + 3273.

It is an arithmetic number, because the mean of its divisors is an integer number (184140).

2^1805456 is an apocalyptic number.

1805456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1805456 is an abundant number, since it is smaller than the sum of its proper divisors (1877344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1805456 is a wasteful number, since it uses less digits than its factorization.

1805456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5966 (or 5960 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 1805456 is about 1343.6725791650. The cubic root of 1805456 is about 121.7668214737.

The spelling of 1805456 in words is "one million, eight hundred five thousand, four hundred fifty-six".