2042805 has 16 divisors (see below), whose sum is σ = 3461184. Its totient is φ = 1025280.

The previous prime is 2042797. The next prime is 2042809. The reversal of 2042805 is 5082402.

It is not a de Polignac number, because 2042805 - 2³ = 2042797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2042809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3751 + ... + 4260.

It is an arithmetic number, because the mean of its divisors is an integer number (216324).

2^2042805 is an apocalyptic number.

It is an amenable number.

2042805 is a deficient number, since it is larger than the sum of its proper divisors (1418379).

2042805 is a wasteful number, since it uses less digits than its factorization.

2042805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8036.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 2042805 is about 1429.2672948053. The cubic root of 2042805 is about 126.8846163046.

The spelling of 2042805 in words is "two million, forty-two thousand, eight hundred five".