2117205 has 16 divisors (see below), whose sum is σ = 3764160. Its totient is φ = 1129104.

The previous prime is 2117179. The next prime is 2117233. The reversal of 2117205 is 5027112.

It is not a de Polignac number, because 2117205 - 2⁷ = 2117077 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7707 + ... + 7976.

It is an arithmetic number, because the mean of its divisors is an integer number (235260).

2^2117205 is an apocalyptic number.

It is an amenable number.

2117205 is a deficient number, since it is larger than the sum of its proper divisors (1646955).

2117205 is a wasteful number, since it uses less digits than its factorization.

2117205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15697 (or 15691 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 2117205 is about 1455.0618543553. The cubic root of 2117205 is about 128.4066858253.

The spelling of 2117205 in words is "two million, one hundred seventeen thousand, two hundred five".