139120925 has 12 divisors (see below), whose sum is σ = 177173556. Its totient is φ = 108288000.

The previous prime is 139120921. The next prime is 139120937. The reversal of 139120925 is 529021931.

It can be written as a sum of positive squares in 6 ways, for example, as 7284601 + 131836324 = 2699^2 + 11482^2 .

It is not a de Polignac number, because 139120925 - 2² = 139120921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 139120891 and 139120900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139120921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74276 + ... + 76125.

It is an arithmetic number, because the mean of its divisors is an integer number (14764463).

Almost surely, 2^139120925 is an apocalyptic number.

It is an amenable number.

139120925 is a deficient number, since it is larger than the sum of its proper divisors (38052631).

139120925 is a wasteful number, since it uses less digits than its factorization.

139120925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150448 (or 150443 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 139120925 is about 11794.9533699799. The cubic root of 139120925 is about 518.1603199294.

The spelling of 139120925 in words is "one hundred thirty-nine million, one hundred twenty thousand, nine hundred twenty-five".