867921 has 8 divisors (see below), whose sum is σ = 1164000. Its totient is φ = 575232.

The previous prime is 867913. The next prime is 867943. The reversal of 867921 is 129768.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 867921 - 2³ = 867913 is a prime.

It is a Curzon number.

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 867921.

It is not an unprimeable number, because it can be changed into a prime (867991) 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 7 ways as a sum of consecutive naturals, for example, 171 + ... + 1328.

It is an arithmetic number, because the mean of its divisors is an integer number (145500).

2⁸⁶⁷⁹²¹ is an apocalyptic number.

It is an amenable number.

867921 is a deficient number, since it is larger than the sum of its proper divisors (296079).

867921 is a wasteful number, since it uses less digits than its factorization.

867921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695.

The product of its digits is 6048, while the sum is 33.

The square root of 867921 is about 931.6227777379. The cubic root of 867921 is about 95.3879244063.

The spelling of 867921 in words is "eight hundred sixty-seven thousand, nine hundred twenty-one".