2171489 has 4 divisors (see below), whose sum is σ = 2174640. Its totient is φ = 2168340.

The previous prime is 2171441. The next prime is 2171497. The reversal of 2171489 is 9841712.

2171489 is nontrivially palindromic in base 11.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2171489 - 2¹² = 2167393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2171089) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 47 + ... + 2084.

It is an arithmetic number, because the mean of its divisors is an integer number (543660).

2^2171489 is an apocalyptic number.

It is an amenable number.

2171489 is a deficient number, since it is larger than the sum of its proper divisors (3151).

2171489 is a wasteful number, since it uses less digits than its factorization.

2171489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3150.

The product of its digits is 4032, while the sum is 32.

The square root of 2171489 is about 1473.5972991289. The cubic root of 2171489 is about 129.4948642140.

The spelling of 2171489 in words is "two million, one hundred seventy-one thousand, four hundred eighty-nine".