138715542 has 48 divisors (see below), whose sum is σ = 361570560. Its totient is φ = 37546416.

The previous prime is 138715531. The next prime is 138715543. The reversal of 138715542 is 245517831.

138715542 is a `hidden beast` number, since 1 + 38 + 71 + 554 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 138715497 and 138715506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138715543) 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, 26578 + ... + 31365.

It is an arithmetic number, because the mean of its divisors is an integer number (7532720).

Almost surely, 2^138715542 is an apocalyptic number.

138715542 is an abundant number, since it is smaller than the sum of its proper divisors (222855018).

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

138715542 is a wasteful number, since it uses less digits than its factorization.

138715542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57977 (or 57974 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 138715542 is about 11777.7562379258. The cubic root of 138715542 is about 517.6565429934.

The spelling of 138715542 in words is "one hundred thirty-eight million, seven hundred fifteen thousand, five hundred forty-two".