2171270 has 16 divisors (see below), whose sum is σ = 3933360. Its totient is φ = 862944.

The previous prime is 2171261. The next prime is 2171293. The reversal of 2171270 is 721712.

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1184 + ... + 2396.

It is an arithmetic number, because the mean of its divisors is an integer number (245835).

2^2171270 is an apocalyptic number.

2171270 is a deficient number, since it is larger than the sum of its proper divisors (1762090).

2171270 is a wasteful number, since it uses less digits than its factorization.

2171270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399.

The product of its (nonzero) digits is 196, while the sum is 20.

The square root of 2171270 is about 1473.5229893015. The cubic root of 2171270 is about 129.4905107759.

Adding to 2171270 its reverse (721712), we get a palindrome (2892982).

The spelling of 2171270 in words is "two million, one hundred seventy-one thousand, two hundred seventy".