867381 has 4 divisors (see below), whose sum is σ = 1156512. Its totient is φ = 578252.

The previous prime is 867371. The next prime is 867389. The reversal of 867381 is 183768.

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 867381 - 2⁷ = 867253 is a prime.

It is a super-2 number, since 2×867381² = 1504699598322, which contains 22 as substring.

It is a D-number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 867381.

It is not an unprimeable number, because it can be changed into a prime (867389) 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, 144561 + ... + 144566.

It is an arithmetic number, because the mean of its divisors is an integer number (289128).

2⁸⁶⁷³⁸¹ is an apocalyptic number.

It is an amenable number.

867381 is a deficient number, since it is larger than the sum of its proper divisors (289131).

867381 is a wasteful number, since it uses less digits than its factorization.

867381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289130.

The product of its digits is 8064, while the sum is 33.

The square root of 867381 is about 931.3329157718. The cubic root of 867381 is about 95.3681375956.

The spelling of 867381 in words is "eight hundred sixty-seven thousand, three hundred eighty-one".