139735 has 4 divisors (see below), whose sum is σ = 167688. Its totient is φ = 111784.

The previous prime is 139729. The next prime is 139739. The reversal of 139735 is 537931.

139735 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 537931 = 17 ⋅31643.

It is a cyclic number.

It is not a de Polignac number, because 139735 - 2⁵ = 139703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13969 + ... + 13978.

It is an arithmetic number, because the mean of its divisors is an integer number (41922).

2¹³⁹⁷³⁵ is an apocalyptic number.

139735 is a deficient number, since it is larger than the sum of its proper divisors (27953).

139735 is an equidigital number, since it uses as much as digits as its factorization.

139735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27952.

The product of its digits is 2835, while the sum is 28.

The square root of 139735 is about 373.8114497979. The cubic root of 139735 is about 51.8921581602.

Subtracting from 139735 its product of digits (2835), we obtain a square (136900 = 370²).

The spelling of 139735 in words is "one hundred thirty-nine thousand, seven hundred thirty-five".