138647425 has 24 divisors (see below), whose sum is σ = 197951616. Its totient is φ = 94362240.

The previous prime is 138647401. The next prime is 138647441. The reversal of 138647425 is 524746831.

It is not a de Polignac number, because 138647425 - 2¹⁵ = 138614657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21084 + ... + 26866.

It is an arithmetic number, because the mean of its divisors is an integer number (8247984).

Almost surely, 2^138647425 is an apocalyptic number.

It is an amenable number.

138647425 is a deficient number, since it is larger than the sum of its proper divisors (59304191).

138647425 is a wasteful number, since it uses less digits than its factorization.

138647425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5937 (or 5932 counting only the distinct ones).

The product of its digits is 161280, while the sum is 40.

The square root of 138647425 is about 11774.8641181119. The cubic root of 138647425 is about 517.5717964597.

The spelling of 138647425 in words is "one hundred thirty-eight million, six hundred forty-seven thousand, four hundred twenty-five".