2115189 has 12 divisors (see below), whose sum is σ = 3073356. Its totient is φ = 1401792.

The previous prime is 2115187. The next prime is 2115193. The reversal of 2115189 is 9815112.

It can be written as a sum of positive squares in 2 ways, for example, as 1703025 + 412164 = 1305^2 + 642^2 .

It is not a de Polignac number, because 2115189 - 2¹ = 2115187 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1177 + ... + 2369.

It is an arithmetic number, because the mean of its divisors is an integer number (256113).

2^2115189 is an apocalyptic number.

It is an amenable number.

2115189 is a deficient number, since it is larger than the sum of its proper divisors (958167).

2115189 is a wasteful number, since it uses less digits than its factorization.

2115189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396 (or 1393 counting only the distinct ones).

The product of its digits is 720, while the sum is 27.

The square root of 2115189 is about 1454.3689353118. The cubic root of 2115189 is about 128.3659166530.

It can be divided in two parts, 2115 and 189, that added together give a square (2304 = 48²).

The spelling of 2115189 in words is "two million, one hundred fifteen thousand, one hundred eighty-nine".