825949 has 8 divisors (see below), whose sum is σ = 900000. Its totient is φ = 754992.

The previous prime is 825947. The next prime is 825959. The reversal of 825949 is 949528.

825949 = 22² + 23² + ... + 135².

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 825949 - 2¹ = 825947 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825947) 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, 199 + ... + 1300.

It is an arithmetic number, because the mean of its divisors is an integer number (112500).

2⁸²⁵⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

825949 is a deficient number, since it is larger than the sum of its proper divisors (74051).

825949 is a wasteful number, since it uses less digits than its factorization.

825949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547.

The product of its digits is 25920, while the sum is 37.

The square root of 825949 is about 908.8173633905. The cubic root of 825949 is about 93.8248208630.

The spelling of 825949 in words is "eight hundred twenty-five thousand, nine hundred forty-nine".