853965 has 24 divisors (see below), whose sum is σ = 1692288. Its totient is φ = 390240.

The previous prime is 853949. The next prime is 853969. The reversal of 853965 is 569358.

It is not a de Polignac number, because 853965 - 2⁴ = 853949 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (853969) 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 23 ways as a sum of consecutive naturals, for example, 1041 + ... + 1670.

It is an arithmetic number, because the mean of its divisors is an integer number (70512).

2⁸⁵³⁹⁶⁵ is an apocalyptic number.

It is an amenable number.

853965 is a deficient number, since it is larger than the sum of its proper divisors (838323).

853965 is a wasteful number, since it uses less digits than its factorization.

853965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2729 (or 2726 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 853965 is about 924.1022670679. The cubic root of 853965 is about 94.8738862113.

The spelling of 853965 in words is "eight hundred fifty-three thousand, nine hundred sixty-five".