1049805 has 24 divisors (see below), whose sum is σ = 1867320. Its totient is φ = 545280.

The previous prime is 1049791. The next prime is 1049809. The reversal of 1049805 is 5089401.

It can be written as a sum of positive squares in 4 ways, for example, as 21609 + 1028196 = 147^2 + 1014^2 .

It is not a de Polignac number, because 1049805 - 2⁵ = 1049773 is a prime.

It is a super-2 number, since 2×1049805² = 2204181076050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1049809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1561 + ... + 2129.

It is an arithmetic number, because the mean of its divisors is an integer number (77805).

2^1049805 is an apocalyptic number.

1049805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1049805 is a deficient number, since it is larger than the sum of its proper divisors (817515).

1049805 is a wasteful number, since it uses less digits than its factorization.

1049805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621 (or 618 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1049805 is about 1024.5999219207. The cubic root of 1049805 is about 101.6333433145.

The spelling of 1049805 in words is "one million, forty-nine thousand, eight hundred five".