825841 has 4 divisors (see below), whose sum is σ = 828400. Its totient is φ = 823284.

The previous prime is 825829. The next prime is 825857. The reversal of 825841 is 148528.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 825841 - 2⁹ = 825329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (825821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 711 + ... + 1468.

It is an arithmetic number, because the mean of its divisors is an integer number (207100).

2⁸²⁵⁸⁴¹ is an apocalyptic number.

It is an amenable number.

825841 is a deficient number, since it is larger than the sum of its proper divisors (2559).

825841 is a wasteful number, since it uses less digits than its factorization.

825841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2558.

The product of its digits is 2560, while the sum is 28.

The square root of 825841 is about 908.7579435691. The cubic root of 825841 is about 93.8207312149.

The spelling of 825841 in words is "eight hundred twenty-five thousand, eight hundred forty-one".