825091 has 4 divisors (see below), whose sum is σ = 836784. Its totient is φ = 813400.

The previous prime is 825073. The next prime is 825101. The reversal of 825091 is 190528.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 825091 - 2⁵ = 825059 is a prime.

It is a Duffinian number.

825091 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825001) 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, 5740 + ... + 5881.

It is an arithmetic number, because the mean of its divisors is an integer number (209196).

2⁸²⁵⁰⁹¹ is an apocalyptic number.

825091 is a deficient number, since it is larger than the sum of its proper divisors (11693).

825091 is a wasteful number, since it uses less digits than its factorization.

825091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11692.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 825091 is about 908.3451986993. The cubic root of 825091 is about 93.7923210405.

The spelling of 825091 in words is "eight hundred twenty-five thousand, ninety-one".