139870025 has 12 divisors (see below), whose sum is σ = 174607500. Its totient is φ = 111142080.

The previous prime is 139870019. The next prime is 139870037. The reversal of 139870025 is 520078931.

139870025 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 6 ways, for example, as 28440889 + 111429136 = 5333^2 + 10556^2 .

It is not a de Polignac number, because 139870025 - 2⁴ = 139870009 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15050 + ... + 22499.

It is an arithmetic number, because the mean of its divisors is an integer number (14550625).

Almost surely, 2^139870025 is an apocalyptic number.

It is an amenable number.

139870025 is a deficient number, since it is larger than the sum of its proper divisors (34737475).

139870025 is a wasteful number, since it uses less digits than its factorization.

139870025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37708 (or 37703 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 139870025 is about 11826.6658446073. The cubic root of 139870025 is about 519.0886712841.

The spelling of 139870025 in words is "one hundred thirty-nine million, eight hundred seventy thousand, twenty-five".