1805045 has 16 divisors (see below), whose sum is σ = 2429568. Its totient is φ = 1275840.

The previous prime is 1805039. The next prime is 1805053. The reversal of 1805045 is 5405081.

It is not a de Polignac number, because 1805045 - 2¹² = 1800949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1805045.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1592 + ... + 2478.

It is an arithmetic number, because the mean of its divisors is an integer number (151848).

2^1805045 is an apocalyptic number.

It is an amenable number.

1805045 is a deficient number, since it is larger than the sum of its proper divisors (624523).

1805045 is a wasteful number, since it uses less digits than its factorization.

1805045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 1805045 is about 1343.5196314159. The cubic root of 1805045 is about 121.7575809713.

It can be divided in two parts, 180 and 5045, that added together give a palindrome (5225).

The spelling of 1805045 in words is "one million, eight hundred five thousand, forty-five".