138125140 has 12 divisors (see below), whose sum is σ = 290062836. Its totient is φ = 55250048.

The previous prime is 138125131. The next prime is 138125161. The reversal of 138125140 is 41521831.

It can be written as a sum of positive squares in 2 ways, for example, as 26357956 + 111767184 = 5134^2 + 10572^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3453109 + ... + 3453148.

It is an arithmetic number, because the mean of its divisors is an integer number (24171903).

Almost surely, 2^138125140 is an apocalyptic number.

138125140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138125140 is an abundant number, since it is smaller than the sum of its proper divisors (151937696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138125140 is a wasteful number, since it uses less digits than its factorization.

138125140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6906266 (or 6906264 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 138125140 is about 11752.6652296405. The cubic root of 138125140 is about 516.9210808532.

Adding to 138125140 its reverse (41521831), we get a palindrome (179646971).

The spelling of 138125140 in words is "one hundred thirty-eight million, one hundred twenty-five thousand, one hundred forty".