138843125 has 10 divisors (see below), whose sum is σ = 173499150. Its totient is φ = 111074000.

The previous prime is 138843121. The next prime is 138843139. The reversal of 138843125 is 521348831.

It is a happy number.

138843125 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 5 ways, for example, as 58400164 + 80442961 = 7642^2 + 8969^2 .

It is not a de Polignac number, because 138843125 - 2² = 138843121 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138843121) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 110450 + ... + 111699.

It is an arithmetic number, because the mean of its divisors is an integer number (17349915).

Almost surely, 2^138843125 is an apocalyptic number.

It is an amenable number.

138843125 is a deficient number, since it is larger than the sum of its proper divisors (34656025).

138843125 is an frugal number, since it uses more digits than its factorization.

138843125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222169 (or 222154 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

The square root of 138843125 is about 11783.1712624403. The cubic root of 138843125 is about 517.8151984600.

The spelling of 138843125 in words is "one hundred thirty-eight million, eight hundred forty-three thousand, one hundred twenty-five".