827845 has 4 divisors (see below), whose sum is σ = 993420. Its totient is φ = 662272.

The previous prime is 827843. The next prime is 827851. The reversal of 827845 is 548728.

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

It can be written as a sum of positive squares in 2 ways, for example, as 133956 + 693889 = 366^2 + 833^2 .

It is a cyclic number.

It is not a de Polignac number, because 827845 - 2¹ = 827843 is a prime.

827845 is a lucky number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 827845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (827843) 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, 82780 + ... + 82789.

It is an arithmetic number, because the mean of its divisors is an integer number (248355).

2⁸²⁷⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

827845 is a deficient number, since it is larger than the sum of its proper divisors (165575).

827845 is a wasteful number, since it uses less digits than its factorization.

827845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165574.

The product of its digits is 17920, while the sum is 34.

The square root of 827845 is about 909.8598793221. The cubic root of 827845 is about 93.8965589139.

The spelling of 827845 in words is "eight hundred twenty-seven thousand, eight hundred forty-five".