2015765 has 8 divisors (see below), whose sum is σ = 2478168. Its totient is φ = 1573120.

The previous prime is 2015753. The next prime is 2015771. The reversal of 2015765 is 5675102.

It can be written as a sum of positive squares in 4 ways, for example, as 5041 + 2010724 = 71^2 + 1418^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2015765 - 2⁶ = 2015701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4712 + ... + 5121.

It is an arithmetic number, because the mean of its divisors is an integer number (309771).

2^2015765 is an apocalyptic number.

It is an amenable number.

2015765 is a deficient number, since it is larger than the sum of its proper divisors (462403).

2015765 is an equidigital number, since it uses as much as digits as its factorization.

2015765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9879.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 2015765 is about 1419.7763908447. The cubic root of 2015765 is about 126.3222832157.

The spelling of 2015765 in words is "two million, fifteen thousand, seven hundred sixty-five".