2128573 has 4 divisors (see below), whose sum is σ = 2186140. Its totient is φ = 2071008.

The previous prime is 2128561. The next prime is 2128591. The reversal of 2128573 is 3758212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1855044 + 273529 = 1362^2 + 523^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2128573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28728 + ... + 28801.

It is an arithmetic number, because the mean of its divisors is an integer number (546535).

2^2128573 is an apocalyptic number.

It is an amenable number.

2128573 is a deficient number, since it is larger than the sum of its proper divisors (57567).

2128573 is an equidigital number, since it uses as much as digits as its factorization.

2128573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57566.

The product of its digits is 3360, while the sum is 28.

The square root of 2128573 is about 1458.9629878787. The cubic root of 2128573 is about 128.6360955704.

It can be divided in two parts, 2128 and 573, that added together give a triangular number (2701 = T₇₃).

The spelling of 2128573 in words is "two million, one hundred twenty-eight thousand, five hundred seventy-three".