864771 has 4 divisors (see below), whose sum is σ = 1153032. Its totient is φ = 576512.

The previous prime is 864757. The next prime is 864781. The reversal of 864771 is 177468.

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 864771 - 2⁶ = 864707 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (864781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144126 + ... + 144131.

It is an arithmetic number, because the mean of its divisors is an integer number (288258).

2⁸⁶⁴⁷⁷¹ is an apocalyptic number.

864771 is a deficient number, since it is larger than the sum of its proper divisors (288261).

864771 is a wasteful number, since it uses less digits than its factorization.

864771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288260.

The product of its digits is 9408, while the sum is 33.

The square root of 864771 is about 929.9306425750. The cubic root of 864771 is about 95.2723853945.

The spelling of 864771 in words is "eight hundred sixty-four thousand, seven hundred seventy-one".