2120591 has 4 divisors (see below), whose sum is σ = 2313384. Its totient is φ = 1927800.

The previous prime is 2120579. The next prime is 2120611. The reversal of 2120591 is 1950212.

2120591 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120591 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 (2120551) 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, 96380 + ... + 96401.

It is an arithmetic number, because the mean of its divisors is an integer number (578346).

2^2120591 is an apocalyptic number.

2120591 is a deficient number, since it is larger than the sum of its proper divisors (192793).

2120591 is a wasteful number, since it uses less digits than its factorization.

2120591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192792.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 2120591 is about 1456.2249139470. The cubic root of 2120591 is about 128.4751020412.

The spelling of 2120591 in words is "two million, one hundred twenty thousand, five hundred ninety-one".