2159591 has 8 divisors (see below), whose sum is σ = 2515104. Its totient is φ = 1815840.

The previous prime is 2159557. The next prime is 2159609. The reversal of 2159591 is 1959512.

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 2159591 - 2¹⁰ = 2158567 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 (2159501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2540 + ... + 3281.

It is an arithmetic number, because the mean of its divisors is an integer number (314388).

2^2159591 is an apocalyptic number.

2159591 is a deficient number, since it is larger than the sum of its proper divisors (355513).

2159591 is an equidigital number, since it uses as much as digits as its factorization.

2159591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5881.

The product of its digits is 4050, while the sum is 32.

The square root of 2159591 is about 1469.5546944568. The cubic root of 2159591 is about 129.2579219629.

The spelling of 2159591 in words is "two million, one hundred fifty-nine thousand, five hundred ninety-one".