2049509 has 16 divisors (see below), whose sum is σ = 2618880. Its totient is φ = 1557360.

The previous prime is 2049493. The next prime is 2049521. The reversal of 2049509 is 9059402.

2049509 = T₂₈₇ + T₂₈₈ + ... + T₃₂₉.

It is not a de Polignac number, because 2049509 - 2⁴ = 2049493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2049569) 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 15 ways as a sum of consecutive naturals, for example, 3002 + ... + 3620.

It is an arithmetic number, because the mean of its divisors is an integer number (163680).

2^2049509 is an apocalyptic number.

It is an amenable number.

2049509 is a deficient number, since it is larger than the sum of its proper divisors (569371).

2049509 is a wasteful number, since it uses less digits than its factorization.

2049509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680.

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

The square root of 2049509 is about 1431.6106314218. The cubic root of 2049509 is about 127.0232664505.

The spelling of 2049509 in words is "two million, forty-nine thousand, five hundred nine".