138285625 has 20 divisors (see below), whose sum is σ = 174659716. Its totient is φ = 109440000.

The previous prime is 138285617. The next prime is 138285673. The reversal of 138285625 is 526582831.

It can be written as a sum of positive squares in 10 ways, for example, as 103286569 + 34999056 = 10163^2 + 5916^2 .

It is not a de Polignac number, because 138285625 - 2³ = 138285617 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 59485 + ... + 61765.

Almost surely, 2^138285625 is an apocalyptic number.

It is an amenable number.

138285625 is a deficient number, since it is larger than the sum of its proper divisors (36374091).

138285625 is an frugal number, since it uses more digits than its factorization.

138285625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2398 (or 2383 counting only the distinct ones).

The product of its digits is 115200, while the sum is 40.

The square root of 138285625 is about 11759.4908478216. The cubic root of 138285625 is about 517.1212036579.

The spelling of 138285625 in words is "one hundred thirty-eight million, two hundred eighty-five thousand, six hundred twenty-five".