864281 has 4 divisors (see below), whose sum is σ = 942864. Its totient is φ = 785700.

The previous prime is 864277. The next prime is 864289. The reversal of 864281 is 182468.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 864281 - 2² = 864277 is a prime.

It is a super-2 number, since 2×864281² = 1493963293922, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (864289) 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, 39275 + ... + 39296.

It is an arithmetic number, because the mean of its divisors is an integer number (235716).

2⁸⁶⁴²⁸¹ is an apocalyptic number.

It is an amenable number.

864281 is a deficient number, since it is larger than the sum of its proper divisors (78583).

864281 is a wasteful number, since it uses less digits than its factorization.

864281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78582.

The product of its digits is 3072, while the sum is 29.

The square root of 864281 is about 929.6671447351. The cubic root of 864281 is about 95.2543874548.

The spelling of 864281 in words is "eight hundred sixty-four thousand, two hundred eighty-one".