2721173 has 16 divisors (see below), whose sum is σ = 3548160. Its totient is φ = 2025216.

The previous prime is 2721167. The next prime is 2721193. The reversal of 2721173 is 3711272.

It is a cyclic number.

It is not a de Polignac number, because 2721173 - 2⁶ = 2721109 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2721113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 668 + ... + 2426.

It is an arithmetic number, because the mean of its divisors is an integer number (221760).

2^2721173 is an apocalyptic number.

It is an amenable number.

2721173 is a deficient number, since it is larger than the sum of its proper divisors (826987).

2721173 is a wasteful number, since it uses less digits than its factorization.

2721173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1796.

The product of its digits is 588, while the sum is 23.

The square root of 2721173 is about 1649.5978297755. The cubic root of 2721173 is about 139.6107042090.

Subtracting 2721173 from its reverse (3711272), we obtain a palindrome (990099).

The spelling of 2721173 in words is "two million, seven hundred twenty-one thousand, one hundred seventy-three".