2173242 has 16 divisors (see below), whose sum is σ = 4387680. Its totient is φ = 717552.

The previous prime is 2173219. The next prime is 2173243. The reversal of 2173242 is 2423712.

It is not an unprimeable number, because it can be changed into a prime (2173243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1008 + ... + 2315.

It is an arithmetic number, because the mean of its divisors is an integer number (274230).

2^2173242 is an apocalyptic number.

2173242 is an abundant number, since it is smaller than the sum of its proper divisors (2214438).

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

2173242 is a wasteful number, since it uses less digits than its factorization.

2173242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3437.

The product of its digits is 672, while the sum is 21.

The square root of 2173242 is about 1474.1919820702. The cubic root of 2173242 is about 129.5297010531.

Subtracting from 2173242 its product of digits (672), we obtain a triangular number (2172570 = T₂₀₈₄).

Adding to 2173242 its reverse (2423712), we get a palindrome (4596954).

It can be divided in two parts, 2173 and 242, that added together give a triangular number (2415 = T₆₉).

The spelling of 2173242 in words is "two million, one hundred seventy-three thousand, two hundred forty-two".