853945 has 8 divisors (see below), whose sum is σ = 1030536. Its totient is φ = 679296.

The previous prime is 853933. The next prime is 853949. The reversal of 853945 is 549358.

It can be written as a sum of positive squares in 4 ways, for example, as 183184 + 670761 = 428^2 + 819^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 853945 - 2⁵ = 853913 is a prime.

It is a Duffinian number.

853945 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 853945.

It is not an unprimeable number, because it can be changed into a prime (853949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 799 + ... + 1531.

It is an arithmetic number, because the mean of its divisors is an integer number (128817).

2⁸⁵³⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

853945 is a deficient number, since it is larger than the sum of its proper divisors (176591).

853945 is a wasteful number, since it uses less digits than its factorization.

853945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971.

The product of its digits is 21600, while the sum is 34.

The square root of 853945 is about 924.0914456914. The cubic root of 853945 is about 94.8731455515.

The spelling of 853945 in words is "eight hundred fifty-three thousand, nine hundred forty-five".