2120565 has 8 divisors (see below), whose sum is σ = 3392928. Its totient is φ = 1130960.

The previous prime is 2120551. The next prime is 2120579. The reversal of 2120565 is 5650212.

2120565 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 (2120551) and next prime (2120579).

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

It is not a de Polignac number, because 2120565 - 2⁴ = 2120549 is a prime.

It is an Ulam number.

2120565 is a lucky number.

It is a congruent number.

It is an unprimeable number.

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, 70671 + ... + 70700.

It is an arithmetic number, because the mean of its divisors is an integer number (424116).

2^2120565 is an apocalyptic number.

It is an amenable number.

2120565 is a deficient number, since it is larger than the sum of its proper divisors (1272363).

2120565 is a wasteful number, since it uses less digits than its factorization.

2120565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141379.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 2120565 is about 1456.2159867272. The cubic root of 2120565 is about 128.4745769728.

Adding to 2120565 its reverse (5650212), we get a palindrome (7770777).

The spelling of 2120565 in words is "two million, one hundred twenty thousand, five hundred sixty-five".