825999 has 8 divisors (see below), whose sum is σ = 1149312. Its totient is φ = 526680.

The previous prime is 825997. The next prime is 826019. The reversal of 825999 is 999528.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 825999 - 2¹ = 825997 is a prime.

825999 is a modest number, since divided by 999 gives 825 as remainder.

825999 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 825999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825991) 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 7 ways as a sum of consecutive naturals, for example, 5917 + ... + 6054.

It is an arithmetic number, because the mean of its divisors is an integer number (143664).

2⁸²⁵⁹⁹⁹ is an apocalyptic number.

825999 is a deficient number, since it is larger than the sum of its proper divisors (323313).

825999 is a wasteful number, since it uses less digits than its factorization.

825999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11997.

The product of its digits is 58320, while the sum is 42.

The square root of 825999 is about 908.8448712514. The cubic root of 825999 is about 93.8267140979.

The spelling of 825999 in words is "eight hundred twenty-five thousand, nine hundred ninety-nine".