825278 has 4 divisors (see below), whose sum is σ = 1237920. Its totient is φ = 412638.

The previous prime is 825277. The next prime is 825281. The reversal of 825278 is 872528.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 206318 + ... + 206321.

It is an arithmetic number, because the mean of its divisors is an integer number (309480).

2⁸²⁵²⁷⁸ is an apocalyptic number.

825278 is a deficient number, since it is larger than the sum of its proper divisors (412642).

825278 is a wasteful number, since it uses less digits than its factorization.

825278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412641.

The product of its digits is 8960, while the sum is 32.

The square root of 825278 is about 908.4481273028. The cubic root of 825278 is about 93.7994062546.

The spelling of 825278 in words is "eight hundred twenty-five thousand, two hundred seventy-eight".