860139 has 40 divisors (see below), whose sum is σ = 1544928. Its totient is φ = 466560.

The previous prime is 860117. The next prime is 860143. The reversal of 860139 is 931068.

It is not a de Polignac number, because 860139 - 2⁵ = 860107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (860239) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 20959 + ... + 20999.

2⁸⁶⁰¹³⁹ is an apocalyptic number.

860139 is a deficient number, since it is larger than the sum of its proper divisors (684789).

860139 is a wasteful number, since it uses less digits than its factorization.

860139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 860139 is about 927.4367902989. The cubic root of 860139 is about 95.1019772897.

It can be divided in two parts, 860 and 139, that added together give a palindrome (999).

The spelling of 860139 in words is "eight hundred sixty thousand, one hundred thirty-nine".