2158572 has 48 divisors (see below), whose sum is σ = 5517792. Its totient is φ = 652800.

The previous prime is 2158567. The next prime is 2158577. The reversal of 2158572 is 2758512.

It is an interprime number because it is at equal distance from previous prime (2158567) and next prime (2158577).

It is not an unprimeable number, because it can be changed into a prime (2158577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15688 + ... + 15824.

It is an arithmetic number, because the mean of its divisors is an integer number (114954).

2^2158572 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2158572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2758896).

2158572 is an abundant number, since it is smaller than the sum of its proper divisors (3359220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2158572 is a wasteful number, since it uses less digits than its factorization.

2158572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 256 counting only the distinct ones).

The product of its digits is 5600, while the sum is 30.

The square root of 2158572 is about 1469.2079498832. The cubic root of 2158572 is about 129.2375887078.

The spelling of 2158572 in words is "two million, one hundred fifty-eight thousand, five hundred seventy-two".