139556065 has 16 divisors (see below), whose sum is σ = 190636416. Its totient is φ = 97081600.

The previous prime is 139556059. The next prime is 139556129. The reversal of 139556065 is 560655931.

It is not a de Polignac number, because 139556065 - 2⁹ = 139555553 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53896 + ... + 56425.

It is an arithmetic number, because the mean of its divisors is an integer number (11914776).

Almost surely, 2^139556065 is an apocalyptic number.

It is an amenable number.

139556065 is a deficient number, since it is larger than the sum of its proper divisors (51080351).

139556065 is a wasteful number, since it uses less digits than its factorization.

139556065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110360.

The product of its (nonzero) digits is 121500, while the sum is 40.

The square root of 139556065 is about 11813.3849933031. The cubic root of 139556065 is about 518.6999885981.

The spelling of 139556065 in words is "one hundred thirty-nine million, five hundred fifty-six thousand, sixty-five".