2172423 has 8 divisors (see below), whose sum is σ = 3159936. Its totient is φ = 1316600.

The previous prime is 2172397. The next prime is 2172427. The reversal of 2172423 is 3242712.

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

It is a cyclic number.

It is not a de Polignac number, because 2172423 - 2¹⁴ = 2156039 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2172423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172427) 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, 32883 + ... + 32948.

It is an arithmetic number, because the mean of its divisors is an integer number (394992).

2^2172423 is an apocalyptic number.

2172423 is a deficient number, since it is larger than the sum of its proper divisors (987513).

2172423 is a wasteful number, since it uses less digits than its factorization.

2172423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65845.

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

The square root of 2172423 is about 1473.9141766060. The cubic root of 2172423 is about 129.5134276462.

The spelling of 2172423 in words is "two million, one hundred seventy-two thousand, four hundred twenty-three".