2865609 has 12 divisors (see below), whose sum is σ = 4273152. Its totient is φ = 1848600.

The previous prime is 2865607. The next prime is 2865617. The reversal of 2865609 is 9065682.

It is not a de Polignac number, because 2865609 - 2¹ = 2865607 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2865601) 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, 4857 + ... + 5414.

It is an arithmetic number, because the mean of its divisors is an integer number (356096).

2^2865609 is an apocalyptic number.

It is an amenable number.

2865609 is a deficient number, since it is larger than the sum of its proper divisors (1407543).

2865609 is a wasteful number, since it uses less digits than its factorization.

2865609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10308 (or 10305 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 2865609 is about 1692.8109758623. The cubic root of 2865609 is about 142.0383583473.

The spelling of 2865609 in words is "two million, eight hundred sixty-five thousand, six hundred nine".