785565 has 48 divisors (see below), whose sum is σ = 1592640. Its totient is φ = 364320.

The previous prime is 785549. The next prime is 785569. The reversal of 785565 is 565587.

It is not a de Polignac number, because 785565 - 2⁴ = 785549 is a prime.

It is a super-2 number, since 2×785565² = 1234224738450, which contains 22 as substring.

Its product of digits (42000) is a multiple of the sum of its prime divisors (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (785569) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34144 + ... + 34166.

It is an arithmetic number, because the mean of its divisors is an integer number (33180).

2⁷⁸⁵⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

785565 is an abundant number, since it is smaller than the sum of its proper divisors (807075).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

785565 is a wasteful number, since it uses less digits than its factorization.

785565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71 (or 42 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The square root of 785565 is about 886.3210479279. The cubic root of 785565 is about 92.2700399321.

The spelling of 785565 in words is "seven hundred eighty-five thousand, five hundred sixty-five".