2117172 has 12 divisors (see below), whose sum is σ = 4940096. Its totient is φ = 705720.

The previous prime is 2117147. The next prime is 2117179. The reversal of 2117172 is 2717112.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2117179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88204 + ... + 88227.

2^2117172 is an apocalyptic number.

It is an amenable number.

2117172 is an abundant number, since it is smaller than the sum of its proper divisors (2822924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2117172 is a wasteful number, since it uses less digits than its factorization.

2117172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176438 (or 176436 counting only the distinct ones).

The product of its digits is 196, while the sum is 21.

The square root of 2117172 is about 1455.0505145870. The cubic root of 2117172 is about 128.4060186812.

The spelling of 2117172 in words is "two million, one hundred seventeen thousand, one hundred seventy-two".