2115205 has 8 divisors (see below), whose sum is σ = 2546712. Its totient is φ = 1686528.

The previous prime is 2115203. The next prime is 2115221. The reversal of 2115205 is 5025112.

It can be written as a sum of positive squares in 4 ways, for example, as 268324 + 1846881 = 518^2 + 1359^2 .

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 2115205 - 2¹ = 2115203 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 (2115203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1677 + ... + 2653.

It is an arithmetic number, because the mean of its divisors is an integer number (318339).

2^2115205 is an apocalyptic number.

It is an amenable number.

2115205 is a deficient number, since it is larger than the sum of its proper divisors (431507).

2115205 is an equidigital number, since it uses as much as digits as its factorization.

2115205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1415.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 2115205 is about 1454.3744359689. The cubic root of 2115205 is about 128.3662403198.

The spelling of 2115205 in words is "two million, one hundred fifteen thousand, two hundred five".