2115985 has 8 divisors (see below), whose sum is σ = 2626920. Its totient is φ = 1634304.

The previous prime is 2115983. The next prime is 2116019. The reversal of 2115985 is 5895112.

It can be written as a sum of positive squares in 4 ways, for example, as 16384 + 2099601 = 128^2 + 1449^2 .

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 2115985 - 2¹ = 2115983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2115983) 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, 7152 + ... + 7441.

It is an arithmetic number, because the mean of its divisors is an integer number (328365).

2^2115985 is an apocalyptic number.

It is an amenable number.

2115985 is a deficient number, since it is larger than the sum of its proper divisors (510935).

2115985 is a wasteful number, since it uses less digits than its factorization.

2115985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14627.

The product of its digits is 3600, while the sum is 31.

The square root of 2115985 is about 1454.6425677808. The cubic root of 2115985 is about 128.3820170983.

The spelling of 2115985 in words is "two million, one hundred fifteen thousand, nine hundred eighty-five".