867139 has 12 divisors (see below), whose sum is σ = 1074576. Its totient is φ = 685152.

The previous prime is 867131. The next prime is 867143. The reversal of 867139 is 931768.

It is not a de Polignac number, because 867139 - 2³ = 867131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (867131) 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 11 ways as a sum of consecutive naturals, for example, 817 + ... + 1549.

It is an arithmetic number, because the mean of its divisors is an integer number (89548).

2⁸⁶⁷¹³⁹ is an apocalyptic number.

867139 is a deficient number, since it is larger than the sum of its proper divisors (207437).

867139 is a wasteful number, since it uses less digits than its factorization.

867139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766 (or 753 counting only the distinct ones).

The product of its digits is 9072, while the sum is 34.

The square root of 867139 is about 931.2029853904. The cubic root of 867139 is about 95.3592675081.

It can be divided in two parts, 86 and 7139, that added together give a square (7225 = 85²).

The spelling of 867139 in words is "eight hundred sixty-seven thousand, one hundred thirty-nine".