825136 has 20 divisors (see below), whose sum is σ = 1722112. Its totient is φ = 380736.

The previous prime is 825131. The next prime is 825161. The reversal of 825136 is 631528.

It is a happy number.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 825136.

It is not an unprimeable number, because it can be changed into a prime (825131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1776 + ... + 2191.

2⁸²⁵¹³⁶ is an apocalyptic number.

It is an amenable number.

825136 is an abundant number, since it is smaller than the sum of its proper divisors (896976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

825136 is a wasteful number, since it uses less digits than its factorization.

825136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3988 (or 3982 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 825136 is about 908.3699686802. The cubic root of 825136 is about 93.7940261364.

It can be divided in two parts, 825 and 136, that added together give a square (961 = 31²).

The spelling of 825136 in words is "eight hundred twenty-five thousand, one hundred thirty-six".