139801065 has 16 divisors (see below), whose sum is σ = 224664000. Its totient is φ = 74233152.

The previous prime is 139801033. The next prime is 139801087. The reversal of 139801065 is 560108931.

It is not a de Polignac number, because 139801065 - 2⁵ = 139801033 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16915 + ... + 23784.

It is an arithmetic number, because the mean of its divisors is an integer number (14041500).

Almost surely, 2^139801065 is an apocalyptic number.

139801065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139801065 is a deficient number, since it is larger than the sum of its proper divisors (84862935).

139801065 is a wasteful number, since it uses less digits than its factorization.

139801065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40936.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 139801065 is about 11823.7500396448. The cubic root of 139801065 is about 519.0033486443.

Adding to 139801065 its reverse (560108931), we get a palindrome (699909996).

The spelling of 139801065 in words is "one hundred thirty-nine million, eight hundred one thousand, sixty-five".