139965 has 32 divisors (see below), whose sum is σ = 270336. Its totient is φ = 60480.

The previous prime is 139943. The next prime is 139967. The reversal of 139965 is 569931.

139965 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 139965 - 2⁶ = 139901 is a prime.

It is a plaindrome in base 16.

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 139965.

It is not an unprimeable number, because it can be changed into a prime (139967) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3234 + ... + 3276.

It is an arithmetic number, because the mean of its divisors is an integer number (8448).

139965 is a Friedman number, since it can be written as (9+9)*6^5-3*1, using all its digits and the basic arithmetic operations.

2¹³⁹⁹⁶⁵ is an apocalyptic number.

139965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139965 is a deficient number, since it is larger than the sum of its proper divisors (130371).

139965 is a wasteful number, since it uses less digits than its factorization.

139965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89.

The product of its digits is 7290, while the sum is 33.

The square root of 139965 is about 374.1189650365. The cubic root of 139965 is about 51.9206135795.

The spelling of 139965 in words is "one hundred thirty-nine thousand, nine hundred sixty-five".