2102765 has 16 divisors (see below), whose sum is σ = 2926848. Its totient is φ = 1420416.

The previous prime is 2102759. The next prime is 2102777. The reversal of 2102765 is 5672012.

It is a cyclic number.

It is not a de Polignac number, because 2102765 - 2¹⁰ = 2101741 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2102765.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2144 + ... + 2966.

It is an arithmetic number, because the mean of its divisors is an integer number (182928).

2^2102765 is an apocalyptic number.

It is an amenable number.

2102765 is a deficient number, since it is larger than the sum of its proper divisors (824083).

2102765 is an equidigital number, since it uses as much as digits as its factorization.

2102765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 2102765 is about 1450.0913764312. The cubic root of 2102765 is about 128.1140950465.

Adding to 2102765 its reverse (5672012), we get a palindrome (7774777).

The spelling of 2102765 in words is "two million, one hundred two thousand, seven hundred sixty-five".