2121613 has 8 divisors (see below), whose sum is σ = 2296728. Its totient is φ = 1948224.

The previous prime is 2121607. The next prime is 2121619. The reversal of 2121613 is 3161212.

2121613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2121607) and next prime (2121619).

It can be written as a sum of positive squares in 4 ways, for example, as 110889 + 2010724 = 333^2 + 1418^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2121613 - 2¹³ = 2113421 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 (2121619) 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, 3531 + ... + 4087.

It is an arithmetic number, because the mean of its divisors is an integer number (287091).

2^2121613 is an apocalyptic number.

It is an amenable number.

2121613 is a deficient number, since it is larger than the sum of its proper divisors (175115).

2121613 is a wasteful number, since it uses less digits than its factorization.

2121613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863.

The product of its digits is 72, while the sum is 16.

The square root of 2121613 is about 1456.5757790105. The cubic root of 2121613 is about 128.4957378713.

Adding to 2121613 its reverse (3161212), we get a palindrome (5282825).

The spelling of 2121613 in words is "two million, one hundred twenty-one thousand, six hundred thirteen".