867881 has 4 divisors (see below), whose sum is σ = 991872. Its totient is φ = 743892.

The previous prime is 867871. The next prime is 867887. The reversal of 867881 is 188768.

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 867881 - 2⁶ = 867817 is a prime.

It is a super-2 number, since 2×867881² = 1506434860322, which contains 22 as substring.

It is a plaindrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 867881.

It is not an unprimeable number, because it can be changed into a prime (867887) 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, 61985 + ... + 61998.

It is an arithmetic number, because the mean of its divisors is an integer number (247968).

2⁸⁶⁷⁸⁸¹ is an apocalyptic number.

It is an amenable number.

867881 is a deficient number, since it is larger than the sum of its proper divisors (123991).

867881 is a wasteful number, since it uses less digits than its factorization.

867881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123990.

The product of its digits is 21504, while the sum is 38.

The square root of 867881 is about 931.6013095740. The cubic root of 867881 is about 95.3864589981.

The spelling of 867881 in words is "eight hundred sixty-seven thousand, eight hundred eighty-one".