825985 has 8 divisors (see below), whose sum is σ = 996840. Its totient is φ = 657024.

The previous prime is 825983. The next prime is 825991. The reversal of 825985 is 589528.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1521 + 824464 = 39^2 + 908^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 825985 - 2¹ = 825983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (825983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 811 + ... + 1519.

It is an arithmetic number, because the mean of its divisors is an integer number (124605).

2⁸²⁵⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

825985 is a deficient number, since it is larger than the sum of its proper divisors (170855).

825985 is a wasteful number, since it uses less digits than its factorization.

825985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947.

The product of its digits is 28800, while the sum is 37.

The square root of 825985 is about 908.8371691343. The cubic root of 825985 is about 93.8261839998.

The spelling of 825985 in words is "eight hundred twenty-five thousand, nine hundred eighty-five".