2016505 has 4 divisors (see below), whose sum is σ = 2419812. Its totient is φ = 1613200.

The previous prime is 2016493. The next prime is 2016517. The reversal of 2016505 is 5056102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2016493) and next prime (2016517).

It can be written as a sum of positive squares in 2 ways, for example, as 583696 + 1432809 = 764^2 + 1197^2 .

It is not a de Polignac number, because 2016505 - 2¹¹ = 2014457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201646 + ... + 201655.

It is an arithmetic number, because the mean of its divisors is an integer number (604953).

2^2016505 is an apocalyptic number.

It is an amenable number.

2016505 is a deficient number, since it is larger than the sum of its proper divisors (403307).

2016505 is an equidigital number, since it uses as much as digits as its factorization.

2016505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403306.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 2016505 is about 1420.0369713497. The cubic root of 2016505 is about 126.3377392259.

The spelling of 2016505 in words is "two million, sixteen thousand, five hundred five".