39139025 has 6 divisors (see below), whose sum is σ = 48532422. Its totient is φ = 31311200.

The previous prime is 39139021. The next prime is 39139027. The reversal of 39139025 is 52093193.

39139025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 2572816 + 36566209 = 1604^2 + 6047^2 .

It is not a de Polignac number, because 39139025 - 2² = 39139021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39138982 and 39139000.

It is not an unprimeable number, because it can be changed into a prime (39139021) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 782756 + ... + 782805.

It is an arithmetic number, because the mean of its divisors is an integer number (8088737).

Almost surely, 2^39139025 is an apocalyptic number.

It is an amenable number.

39139025 is a deficient number, since it is larger than the sum of its proper divisors (9393397).

39139025 is a wasteful number, since it uses less digits than its factorization.

39139025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565571 (or 1565566 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 32.

The square root of 39139025 is about 6256.1190046226. The cubic root of 39139025 is about 339.5236264062.

The spelling of 39139025 in words is "thirty-nine million, one hundred thirty-nine thousand, twenty-five".