2158172 has 24 divisors (see below), whose sum is σ = 4040400. Its totient is φ = 1005696.

The previous prime is 2158171. The next prime is 2158181. The reversal of 2158172 is 2718512.

2158172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158171) 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 7 ways as a sum of consecutive naturals, for example, 5354 + ... + 5742.

It is an arithmetic number, because the mean of its divisors is an integer number (168350).

2^2158172 is an apocalyptic number.

It is an amenable number.

2158172 is a deficient number, since it is larger than the sum of its proper divisors (1882228).

2158172 is a wasteful number, since it uses less digits than its factorization.

2158172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485 (or 483 counting only the distinct ones).

The product of its digits is 1120, while the sum is 26.

The square root of 2158172 is about 1469.0718158075. The cubic root of 2158172 is about 129.2296053081.

The spelling of 2158172 in words is "two million, one hundred fifty-eight thousand, one hundred seventy-two".