828545 has 4 divisors (see below), whose sum is σ = 994260. Its totient is φ = 662832.

The previous prime is 828523. The next prime is 828547. The reversal of 828545 is 545828.

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 495616 + 332929 = 704^2 + 577^2 .

It is a cyclic number.

It is not a de Polignac number, because 828545 - 2¹⁰ = 827521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (828547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82850 + ... + 82859.

It is an arithmetic number, because the mean of its divisors is an integer number (248565).

2⁸²⁸⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

828545 is a deficient number, since it is larger than the sum of its proper divisors (165715).

828545 is a wasteful number, since it uses less digits than its factorization.

828545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165714.

The product of its digits is 12800, while the sum is 32.

The square root of 828545 is about 910.2444726556. The cubic root of 828545 is about 93.9230167952.

The spelling of 828545 in words is "eight hundred twenty-eight thousand, five hundred forty-five".