138107142 has 48 divisors (see below), whose sum is σ = 309188880. Its totient is φ = 44525376.

The previous prime is 138107117. The next prime is 138107149. The reversal of 138107142 is 241701831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138107149) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83548 + ... + 85184.

It is an arithmetic number, because the mean of its divisors is an integer number (6441435).

Almost surely, 2^138107142 is an apocalyptic number.

138107142 is an abundant number, since it is smaller than the sum of its proper divisors (171081738).

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

138107142 is a wasteful number, since it uses less digits than its factorization.

138107142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1797 (or 1794 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 138107142 is about 11751.8995060373. The cubic root of 138107142 is about 516.8986279052.

Adding to 138107142 its reverse (241701831), we get a palindrome (379808973).

The spelling of 138107142 in words is "one hundred thirty-eight million, one hundred seven thousand, one hundred forty-two".