138309125 has 16 divisors (see below), whose sum is σ = 174702528. Its totient is φ = 109306000.

The previous prime is 138309103. The next prime is 138309131. The reversal of 138309125 is 521903831.

It is not a de Polignac number, because 138309125 - 2⁸ = 138308869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138309091 and 138309100.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3710 + ... + 17040.

It is an arithmetic number, because the mean of its divisors is an integer number (10918908).

Almost surely, 2^138309125 is an apocalyptic number.

It is an amenable number.

138309125 is a deficient number, since it is larger than the sum of its proper divisors (36393403).

138309125 is an equidigital number, since it uses as much as digits as its factorization.

138309125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13429 (or 13419 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 138309125 is about 11760.4899982951. The cubic root of 138309125 is about 517.1504948682.

The spelling of 138309125 in words is "one hundred thirty-eight million, three hundred nine thousand, one hundred twenty-five".