2172886 has 4 divisors (see below), whose sum is σ = 3259332. Its totient is φ = 1086442.

The previous prime is 2172871. The next prime is 2172887. The reversal of 2172886 is 6882712.

2172886 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 543220 + ... + 543223.

It is an arithmetic number, because the mean of its divisors is an integer number (814833).

2^2172886 is an apocalyptic number.

2172886 is a deficient number, since it is larger than the sum of its proper divisors (1086446).

2172886 is a wasteful number, since it uses less digits than its factorization.

2172886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086445.

The product of its digits is 10752, while the sum is 34.

The square root of 2172886 is about 1474.0712330142. The cubic root of 2172886 is about 129.5226278890.

The spelling of 2172886 in words is "two million, one hundred seventy-two thousand, eight hundred eighty-six".