2125728 has 108 divisors (see below), whose sum is σ = 6753474. Its totient is φ = 633600.

The previous prime is 2125703. The next prime is 2125733. The reversal of 2125728 is 8275212.

It can be written as a sum of positive squares in only one way, i.e., 2108304 + 17424 = 1452^2 + 132^2 .

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 12.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 34818 + ... + 34878.

2^2125728 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 2125728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3376737).

2125728 is an abundant number, since it is smaller than the sum of its proper divisors (4627746).

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

2125728 is a wasteful number, since it uses less digits than its factorization.

2125728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99 (or 77 counting only the distinct ones).

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

The square root of 2125728 is about 1457.9876542687. The cubic root of 2125728 is about 128.5787593704.

The spelling of 2125728 in words is "two million, one hundred twenty-five thousand, seven hundred twenty-eight".