863281 has 4 divisors (see below), whose sum is σ = 867312. Its totient is φ = 859252.

The previous prime is 863279. The next prime is 863287. The reversal of 863281 is 182368.

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 863281 - 2¹ = 863279 is a prime.

It is a super-2 number, since 2×863281² = 1490508169922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (863287) 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, 1675 + ... + 2128.

It is an arithmetic number, because the mean of its divisors is an integer number (216828).

2⁸⁶³²⁸¹ is an apocalyptic number.

It is an amenable number.

863281 is a deficient number, since it is larger than the sum of its proper divisors (4031).

863281 is a wasteful number, since it uses less digits than its factorization.

863281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4030.

The product of its digits is 2304, while the sum is 28.

The square root of 863281 is about 929.1291621728. The cubic root of 863281 is about 95.2176358472.

The spelling of 863281 in words is "eight hundred sixty-three thousand, two hundred eighty-one".