2041605 has 30 divisors (see below), whose sum is σ = 3712038. Its totient is φ = 1073520.

The previous prime is 2041601. The next prime is 2041619. The reversal of 2041605 is 5061402.

It is a happy number.

2041605 is a `hidden beast` number, since 20 + 41 + 605 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1633284 + 408321 = 1278^2 + 639^2 .

It is not a de Polignac number, because 2041605 - 2² = 2041601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2041601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 28720 + ... + 28790.

2^2041605 is an apocalyptic number.

It is an amenable number.

2041605 is a deficient number, since it is larger than the sum of its proper divisors (1670433).

2041605 is an frugal number, since it uses more digits than its factorization.

2041605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 2041605 is about 1428.8474376224. The cubic root of 2041605 is about 126.8597662637.

The spelling of 2041605 in words is "two million, forty-one thousand, six hundred five".