2205765 has 16 divisors (see below), whose sum is σ = 3921600. Its totient is φ = 1176336.

The previous prime is 2205761. The next prime is 2205779. The reversal of 2205765 is 5675022.

It is not a de Polignac number, because 2205765 - 2² = 2205761 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2205761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8035 + ... + 8304.

It is an arithmetic number, because the mean of its divisors is an integer number (245100).

2^2205765 is an apocalyptic number.

It is an amenable number.

2205765 is a deficient number, since it is larger than the sum of its proper divisors (1715835).

2205765 is a wasteful number, since it uses less digits than its factorization.

2205765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16353 (or 16347 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 2205765 is about 1485.1818070526. The cubic root of 2205765 is about 130.1726502897.

It can be divided in two parts, 22057 and 65, that added together give a palindrome (22122).

The spelling of 2205765 in words is "two million, two hundred five thousand, seven hundred sixty-five".