2049605 has 8 divisors (see below), whose sum is σ = 2604312. Its totient is φ = 1543168.

The previous prime is 2049589. The next prime is 2049611. The reversal of 2049605 is 5069402.

It can be written as a sum of positive squares in 4 ways, for example, as 568516 + 1481089 = 754^2 + 1217^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2049605 - 2⁴ = 2049589 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11972 + ... + 12141.

It is an arithmetic number, because the mean of its divisors is an integer number (325539).

2^2049605 is an apocalyptic number.

It is an amenable number.

2049605 is a deficient number, since it is larger than the sum of its proper divisors (554707).

2049605 is a wasteful number, since it uses less digits than its factorization.

2049605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24135.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 2049605 is about 1431.6441596989. The cubic root of 2049605 is about 127.0252496968.

The spelling of 2049605 in words is "two million, forty-nine thousand, six hundred five".