4049605 has 12 divisors (see below), whose sum is σ = 5653260. Its totient is φ = 2776704.

The previous prime is 4049593. The next prime is 4049609. The reversal of 4049605 is 5069404.

4049605 = T₄₅ + T₄₆ + ... + T₂₈₉.

It can be written as a sum of positive squares in 2 ways, for example, as 2683044 + 1366561 = 1638^2 + 1169^2 .

It is not a de Polignac number, because 4049605 - 2⁹ = 4049093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4049609) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 8020 + ... + 8509.

It is an arithmetic number, because the mean of its divisors is an integer number (471105).

Almost surely, 2^4049605 is an apocalyptic number.

It is an amenable number.

4049605 is a deficient number, since it is larger than the sum of its proper divisors (1603655).

4049605 is a wasteful number, since it uses less digits than its factorization.

4049605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16548 (or 16541 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 4049605 is about 2012.3630388178. The cubic root of 4049605 is about 159.3936031085.

The spelling of 4049605 in words is "four million, forty-nine thousand, six hundred five".