2171172 has 48 divisors (see below), whose sum is σ = 5564160. Its totient is φ = 655872.

The previous prime is 2171161. The next prime is 2171203. The reversal of 2171172 is 2711712.

It is a happy 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, 5733 + ... + 6099.

It is an arithmetic number, because the mean of its divisors is an integer number (115920).

2^2171172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2171172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2782080).

2171172 is an abundant number, since it is smaller than the sum of its proper divisors (3392988).

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

2171172 is a wasteful number, since it uses less digits than its factorization.

2171172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420 (or 418 counting only the distinct ones).

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

The square root of 2171172 is about 1473.4897352883. The cubic root of 2171172 is about 129.4885625672.

Adding to 2171172 its reverse (2711712), we get a palindrome (4882884).

The spelling of 2171172 in words is "two million, one hundred seventy-one thousand, one hundred seventy-two".