139871225 has 24 divisors (see below), whose sum is σ = 192820992. Its totient is φ = 99950400.

The previous prime is 139871209. The next prime is 139871233. The reversal of 139871225 is 522178931.

139871225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 139871225 - 2⁴ = 139871209 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3134 + ... + 17016.

It is an arithmetic number, because the mean of its divisors is an integer number (8034208).

Almost surely, 2^139871225 is an apocalyptic number.

It is an amenable number.

139871225 is a deficient number, since it is larger than the sum of its proper divisors (52949767).

139871225 is a wasteful number, since it uses less digits than its factorization.

139871225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13937 (or 13932 counting only the distinct ones).

The product of its digits is 30240, while the sum is 38.

The square root of 139871225 is about 11826.7165773092. The cubic root of 139871225 is about 519.0901557685.

The spelling of 139871225 in words is "one hundred thirty-nine million, eight hundred seventy-one thousand, two hundred twenty-five".