853971 has 4 divisors (see below), whose sum is σ = 1138632. Its totient is φ = 569312.

The previous prime is 853969. The next prime is 853981. The reversal of 853971 is 179358.

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

It is a cyclic number.

It is not a de Polignac number, because 853971 - 2¹ = 853969 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (853901) 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 3 ways as a sum of consecutive naturals, for example, 142326 + ... + 142331.

It is an arithmetic number, because the mean of its divisors is an integer number (284658).

2⁸⁵³⁹⁷¹ is an apocalyptic number.

853971 is a deficient number, since it is larger than the sum of its proper divisors (284661).

853971 is a wasteful number, since it uses less digits than its factorization.

853971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284660.

The product of its digits is 7560, while the sum is 33.

The square root of 853971 is about 924.1055134561. The cubic root of 853971 is about 94.8741084069.

The spelling of 853971 in words is "eight hundred fifty-three thousand, nine hundred seventy-one".