2128613 has 4 divisors (see below), whose sum is σ = 2152620. Its totient is φ = 2104608.

The previous prime is 2128603. The next prime is 2128631. The reversal of 2128613 is 3168212.

2128613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 833569 + 1295044 = 913^2 + 1138^2 .

It is a cyclic number.

It is not a de Polignac number, because 2128613 - 2⁶ = 2128549 is a prime.

It is a d-powerful number, because it can be written as 2¹³ + 1 + 2¹⁹ + 8³ + 6⁴ + 1 + 3¹³ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128603) 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 3 ways as a sum of consecutive naturals, for example, 11870 + ... + 12047.

It is an arithmetic number, because the mean of its divisors is an integer number (538155).

2^2128613 is an apocalyptic number.

It is an amenable number.

2128613 is a deficient number, since it is larger than the sum of its proper divisors (24007).

2128613 is an equidigital number, since it uses as much as digits as its factorization.

2128613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24006.

The product of its digits is 576, while the sum is 23.

The square root of 2128613 is about 1458.9766961813. The cubic root of 2128613 is about 128.6369013389.

The spelling of 2128613 in words is "two million, one hundred twenty-eight thousand, six hundred thirteen".