2209605 has 16 divisors (see below), whose sum is σ = 3721920. Its totient is φ = 1116288.

The previous prime is 2209601. The next prime is 2209607. The reversal of 2209605 is 5069022.

2209605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2209605 - 2² = 2209601 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2209601) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3592 + ... + 4161.

It is an arithmetic number, because the mean of its divisors is an integer number (232620).

2^2209605 is an apocalyptic number.

It is an amenable number.

2209605 is a deficient number, since it is larger than the sum of its proper divisors (1512315).

2209605 is a wasteful number, since it uses less digits than its factorization.

2209605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7780.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 2209605 is about 1486.4740159182. The cubic root of 2209605 is about 130.2481453655.

The spelling of 2209605 in words is "two million, two hundred nine thousand, six hundred five".