1805056 has 36 divisors (see below), whose sum is σ = 3936744. Its totient is φ = 819200.

The previous prime is 1805053. The next prime is 1805059. The reversal of 1805056 is 6505081.

It is an interprime number because it is at equal distance from previous prime (1805053) and next prime (1805059).

It is a self number, because there is not a number n which added to its sum of digits gives 1805056.

It is not an unprimeable number, because it can be changed into a prime (1805053) 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, 2496 + ... + 3136.

It is an arithmetic number, because the mean of its divisors is an integer number (109354).

2^1805056 is an apocalyptic number.

1805056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1805056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1968372).

1805056 is an abundant number, since it is smaller than the sum of its proper divisors (2131688).

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

1805056 is an equidigital number, since it uses as much as digits as its factorization.

1805056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668 (or 654 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 1805056 is about 1343.5237251348. The cubic root of 1805056 is about 121.7578283023.

Adding to 1805056 its sum of digits (25), we get a palindrome (1805081).

The spelling of 1805056 in words is "one million, eight hundred five thousand, fifty-six".