825807 has 4 divisors (see below), whose sum is σ = 1101080. Its totient is φ = 550536.

The previous prime is 825791. The next prime is 825821. The reversal of 825807 is 708528.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 825807 - 2⁴ = 825791 is a prime.

It is a D-number.

It is a Duffinian number.

825807 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137632 + ... + 137637.

It is an arithmetic number, because the mean of its divisors is an integer number (275270).

2⁸²⁵⁸⁰⁷ is an apocalyptic number.

825807 is a deficient number, since it is larger than the sum of its proper divisors (275273).

825807 is a wasteful number, since it uses less digits than its factorization.

825807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275272.

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 825807 is about 908.7392365250. The cubic root of 825807 is about 93.8194436592.

The spelling of 825807 in words is "eight hundred twenty-five thousand, eight hundred seven".