139942772 has 12 divisors (see below), whose sum is σ = 247325316. Its totient is φ = 69278400.

The previous prime is 139942757. The next prime is 139942783. The reversal of 139942772 is 277249931.

It can be written as a sum of positive squares in 2 ways, for example, as 84529636 + 55413136 = 9194^2 + 7444^2 .

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, 172793 + ... + 173600.

It is an arithmetic number, because the mean of its divisors is an integer number (20610443).

Almost surely, 2^139942772 is an apocalyptic number.

It is an amenable number.

139942772 is a deficient number, since it is larger than the sum of its proper divisors (107382544).

139942772 is a wasteful number, since it uses less digits than its factorization.

139942772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346498 (or 346496 counting only the distinct ones).

The product of its digits is 190512, while the sum is 44.

The square root of 139942772 is about 11829.7409946287. The cubic root of 139942772 is about 519.1786491015.

The spelling of 139942772 in words is "one hundred thirty-nine million, nine hundred forty-two thousand, seven hundred seventy-two".