2049905 has 32 divisors (see below), whose sum is σ = 2999808. Its totient is φ = 1324800.

The previous prime is 2049893. The next prime is 2049919. The reversal of 2049905 is 5099402.

It is a de Polignac number, because none of the positive numbers 2^k-2049905 is a prime.

It is a super-2 number, since 2×2049905² = 8404221018050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 33575 + ... + 33635.

It is an arithmetic number, because the mean of its divisors is an integer number (93744).

2^2049905 is an apocalyptic number.

It is an amenable number.

2049905 is a deficient number, since it is larger than the sum of its proper divisors (949903).

2049905 is a wasteful number, since it uses less digits than its factorization.

2049905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 2049905 is about 1431.7489305042. The cubic root of 2049905 is about 127.0314469422.

The spelling of 2049905 in words is "two million, forty-nine thousand, nine hundred five".