139001385 has 16 divisors (see below), whose sum is σ = 222805440. Its totient is φ = 73999680.

The previous prime is 139001377. The next prime is 139001399. The reversal of 139001385 is 583100931.

It is a happy number.

It is not a de Polignac number, because 139001385 - 2³ = 139001377 is a prime.

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, 451 + ... + 16679.

It is an arithmetic number, because the mean of its divisors is an integer number (13925340).

Almost surely, 2^139001385 is an apocalyptic number.

139001385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139001385 is a deficient number, since it is larger than the sum of its proper divisors (83804055).

139001385 is a wasteful number, since it uses less digits than its factorization.

139001385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16808.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 139001385 is about 11789.8848594887. The cubic root of 139001385 is about 518.0118672217.

The spelling of 139001385 in words is "one hundred thirty-nine million, one thousand, three hundred eighty-five".