2159565 has 8 divisors (see below), whose sum is σ = 3455328. Its totient is φ = 1151760.

The previous prime is 2159557. The next prime is 2159609. The reversal of 2159565 is 5659512.

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

It is not a de Polignac number, because 2159565 - 2³ = 2159557 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 2²¹ + 1 + 5² + 9² + 5² + 6⁶ + 5⁶ .

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71971 + ... + 72000.

It is an arithmetic number, because the mean of its divisors is an integer number (431916).

2^2159565 is an apocalyptic number.

It is an amenable number.

2159565 is a deficient number, since it is larger than the sum of its proper divisors (1295763).

2159565 is a wasteful number, since it uses less digits than its factorization.

2159565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143979.

The product of its digits is 13500, while the sum is 33.

The square root of 2159565 is about 1469.5458482130. The cubic root of 2159565 is about 129.2574032352.

The spelling of 2159565 in words is "two million, one hundred fifty-nine thousand, five hundred sixty-five".