849565 has 4 divisors (see below), whose sum is σ = 1019484. Its totient is φ = 679648.

The previous prime is 849539. The next prime is 849571. The reversal of 849565 is 565948.

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 657721 + 191844 = 811^2 + 438^2 .

It is a cyclic number.

It is not a de Polignac number, because 849565 - 2⁵ = 849533 is a prime.

It is a Duffinian number.

849565 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84952 + ... + 84961.

It is an arithmetic number, because the mean of its divisors is an integer number (254871).

2⁸⁴⁹⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

849565 is a deficient number, since it is larger than the sum of its proper divisors (169919).

849565 is a wasteful number, since it uses less digits than its factorization.

849565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169918.

The product of its digits is 43200, while the sum is 37.

The square root of 849565 is about 921.7185036658. The cubic root of 849565 is about 94.7106616795.

The spelling of 849565 in words is "eight hundred forty-nine thousand, five hundred sixty-five".