2172285 has 16 divisors (see below), whose sum is σ = 3862080. Its totient is φ = 1158480.

The previous prime is 2172283. The next prime is 2172323. The reversal of 2172285 is 5822712.

2172285 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2172285 - 2¹ = 2172283 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

2172285 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172283) 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 in 15 ways as a sum of consecutive naturals, for example, 7911 + ... + 8180.

It is an arithmetic number, because the mean of its divisors is an integer number (241380).

2^2172285 is an apocalyptic number.

It is an amenable number.

2172285 is a deficient number, since it is larger than the sum of its proper divisors (1689795).

2172285 is a wasteful number, since it uses less digits than its factorization.

2172285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16105 (or 16099 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 2172285 is about 1473.8673617392. The cubic root of 2172285 is about 129.5106852043.

Adding to 2172285 its reverse (5822712), we get a palindrome (7994997).

The spelling of 2172285 in words is "two million, one hundred seventy-two thousand, two hundred eighty-five".