825645 has 16 divisors (see below), whose sum is σ = 1391040. Its totient is φ = 417024.

The previous prime is 825637. The next prime is 825647. The reversal of 825645 is 546528.

825645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 825645 - 2³ = 825637 is a prime.

It is a super-3 number, since 3×825645³ = 1688500992915633375, which contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825647) 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, 1164 + ... + 1733.

It is an arithmetic number, because the mean of its divisors is an integer number (86940).

2⁸²⁵⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

825645 is a deficient number, since it is larger than the sum of its proper divisors (565395).

825645 is a wasteful number, since it uses less digits than its factorization.

825645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2924.

The product of its digits is 9600, while the sum is 30.

The square root of 825645 is about 908.6500976724. The cubic root of 825645 is about 93.8133083501.

The spelling of 825645 in words is "eight hundred twenty-five thousand, six hundred forty-five".