2109559 has 6 divisors (see below), whose sum is σ = 2152976. Its totient is φ = 2067000.

The previous prime is 2109553. The next prime is 2109571. The reversal of 2109559 is 9559012.

It is not a de Polignac number, because 2109559 - 2¹⁵ = 2076791 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2109559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2109553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2434 + ... + 3184.

2^2109559 is an apocalyptic number.

2109559 is a deficient number, since it is larger than the sum of its proper divisors (43417).

2109559 is an frugal number, since it uses more digits than its factorization.

2109559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857 (or 804 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 31.

The square root of 2109559 is about 1452.4320982407. The cubic root of 2109559 is about 128.2519249065.

It can be divided in two parts, 2 and 109559, that added together give a square (109561 = 331²).

The spelling of 2109559 in words is "two million, one hundred nine thousand, five hundred fifty-nine".