2173245 has 8 divisors (see below), whose sum is σ = 3477216. Its totient is φ = 1159056.

The previous prime is 2173243. The next prime is 2173307. The reversal of 2173245 is 5423712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2173245 - 2¹ = 2173243 is a prime.

It is a congruent number.

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, 72427 + ... + 72456.

It is an arithmetic number, because the mean of its divisors is an integer number (434652).

2^2173245 is an apocalyptic number.

It is an amenable number.

2173245 is a deficient number, since it is larger than the sum of its proper divisors (1303971).

2173245 is a wasteful number, since it uses less digits than its factorization.

2173245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144891.

The product of its digits is 1680, while the sum is 24.

The square root of 2173245 is about 1474.1929995764. The cubic root of 2173245 is about 129.5297606551.

Adding to 2173245 its reverse (5423712), we get a palindrome (7596957).

The spelling of 2173245 in words is "two million, one hundred seventy-three thousand, two hundred forty-five".