2158559 has 4 divisors (see below), whose sum is σ = 2324616. Its totient is φ = 1992504.

The previous prime is 2158549. The next prime is 2158567. The reversal of 2158559 is 9558512.

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-2158559 is a prime.

It is a Duffinian number.

It is a zygodrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83009 + ... + 83034.

It is an arithmetic number, because the mean of its divisors is an integer number (581154).

2^2158559 is an apocalyptic number.

2158559 is a deficient number, since it is larger than the sum of its proper divisors (166057).

2158559 is a wasteful number, since it uses less digits than its factorization.

2158559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166056.

The product of its digits is 18000, while the sum is 35.

The square root of 2158559 is about 1469.2035257241. The cubic root of 2158559 is about 129.2373292628.

The spelling of 2158559 in words is "two million, one hundred fifty-eight thousand, five hundred fifty-nine".