139885 has 8 divisors (see below), whose sum is σ = 170136. Its totient is φ = 110400.

The previous prime is 139883. The next prime is 139891. The reversal of 139885 is 588931.

It can be written as a sum of positive squares in 4 ways, for example, as 24964 + 114921 = 158^2 + 339^2 .

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

It is not a de Polignac number, because 139885 - 2¹ = 139883 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 139885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367 + ... + 643.

It is an arithmetic number, because the mean of its divisors is an integer number (21267).

2¹³⁹⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

139885 is a deficient number, since it is larger than the sum of its proper divisors (30251).

139885 is a wasteful number, since it uses less digits than its factorization.

139885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383.

The product of its digits is 8640, while the sum is 34.

The square root of 139885 is about 374.0120318920. The cubic root of 139885 is about 51.9107195805.

It can be divided in two parts, 139 and 885, that added together give a 10-th power (1024 = 2¹⁰).

The spelling of 139885 in words is "one hundred thirty-nine thousand, eight hundred eighty-five".