138822125 has 16 divisors (see below), whose sum is σ = 186579120. Its totient is φ = 102513600.

The previous prime is 138822107. The next prime is 138822127. The reversal of 138822125 is 521228831.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 115906756 + 22915369 = 10766^2 + 4787^2 .

It is a de Polignac number, because none of the positive numbers 2^k-138822125 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138822091 and 138822100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138822127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41090 + ... + 44339.

It is an arithmetic number, because the mean of its divisors is an integer number (11661195).

Almost surely, 2^138822125 is an apocalyptic number.

It is an amenable number.

138822125 is a deficient number, since it is larger than the sum of its proper divisors (47756995).

138822125 is an equidigital number, since it uses as much as digits as its factorization.

138822125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85457 (or 85447 counting only the distinct ones).

The product of its digits is 7680, while the sum is 32.

The square root of 138822125 is about 11782.2801273777. The cubic root of 138822125 is about 517.7890906556.

The spelling of 138822125 in words is "one hundred thirty-eight million, eight hundred twenty-two thousand, one hundred twenty-five".