2271605 has 16 divisors (see below), whose sum is σ = 3193344. Its totient is φ = 1518720.

The previous prime is 2271593. The next prime is 2271613. The reversal of 2271605 is 5061722.

2271605 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 2271605 - 2⁸ = 2271349 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 644 + ... + 2226.

It is an arithmetic number, because the mean of its divisors is an integer number (199584).

2^2271605 is an apocalyptic number.

It is an amenable number.

2271605 is a deficient number, since it is larger than the sum of its proper divisors (921739).

2271605 is a wasteful number, since it uses less digits than its factorization.

2271605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 2271605 is about 1507.1844611726. The cubic root of 2271605 is about 131.4551500730.

The spelling of 2271605 in words is "two million, two hundred seventy-one thousand, six hundred five".