139559 has 4 divisors (see below), whose sum is σ = 159504. Its totient is φ = 119616.

The previous prime is 139547. The next prime is 139571. The reversal of 139559 is 955931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 955931 = 61 ⋅15671.

It is an interprime number because it is at equal distance from previous prime (139547) and next prime (139571).

It is not a de Polignac number, because 139559 - 2⁸ = 139303 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 (139589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9962 + ... + 9975.

It is an arithmetic number, because the mean of its divisors is an integer number (39876).

2¹³⁹⁵⁵⁹ is an apocalyptic number.

139559 is a deficient number, since it is larger than the sum of its proper divisors (19945).

139559 is an equidigital number, since it uses as much as digits as its factorization.

139559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19944.

The product of its digits is 6075, while the sum is 32.

The square root of 139559 is about 373.5759628242. The cubic root of 139559 is about 51.8703624828.

The spelling of 139559 in words is "one hundred thirty-nine thousand, five hundred fifty-nine".