139906012 has 12 divisors (see below), whose sum is σ = 244972000. Its totient is φ = 69914016.

The previous prime is 139906009. The next prime is 139906021. The reversal of 139906012 is 210609931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 753 + ... + 16744.

Almost surely, 2^139906012 is an apocalyptic number.

It is an amenable number.

139906012 is a deficient number, since it is larger than the sum of its proper divisors (105065988).

139906012 is a wasteful number, since it uses less digits than its factorization.

139906012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19500 (or 19498 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 139906012 is about 11828.1871814746. The cubic root of 139906012 is about 519.1331860449.

It can be divided in two parts, 13990 and 6012, that added together give a palindrome (20002).

The spelling of 139906012 in words is "one hundred thirty-nine million, nine hundred six thousand, twelve".