825905 has 4 divisors (see below), whose sum is σ = 991092. Its totient is φ = 660720.

The previous prime is 825889. The next prime is 825919. The reversal of 825905 is 509528.

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

It can be written as a sum of positive squares in 2 ways, for example, as 602176 + 223729 = 776^2 + 473^2 .

It is not a de Polignac number, because 825905 - 2⁴ = 825889 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82586 + ... + 82595.

It is an arithmetic number, because the mean of its divisors is an integer number (247773).

2⁸²⁵⁹⁰⁵ is an apocalyptic number.

It is an amenable number.

825905 is a deficient number, since it is larger than the sum of its proper divisors (165187).

825905 is a wasteful number, since it uses less digits than its factorization.

825905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165186.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 825905 is about 908.7931557841. The cubic root of 825905 is about 93.8231547531.

The spelling of 825905 in words is "eight hundred twenty-five thousand, nine hundred five".