825878 has 4 divisors (see below), whose sum is σ = 1238820. Its totient is φ = 412938.

The previous prime is 825857. The next prime is 825883. The reversal of 825878 is 878528.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

825878 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 206468 + ... + 206471.

It is an arithmetic number, because the mean of its divisors is an integer number (309705).

2⁸²⁵⁸⁷⁸ is an apocalyptic number.

825878 is a deficient number, since it is larger than the sum of its proper divisors (412942).

825878 is a wasteful number, since it uses less digits than its factorization.

825878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412941.

The product of its digits is 35840, while the sum is 38.

The square root of 825878 is about 908.7783007973. The cubic root of 825878 is about 93.8221323382.

Subtracting 825878 from its reverse (878528), we obtain a triangular number (52650 = T₃₂₄).

The spelling of 825878 in words is "eight hundred twenty-five thousand, eight hundred seventy-eight".