138121060 has 48 divisors (see below), whose sum is σ = 361630080. Its totient is φ = 43050240.

The previous prime is 138121007. The next prime is 138121069. The reversal of 138121060 is 60121831.

138121060 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (138121069) 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, 43305 + ... + 46384.

It is an arithmetic number, because the mean of its divisors is an integer number (7533960).

Almost surely, 2^138121060 is an apocalyptic number.

138121060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138121060 is an abundant number, since it is smaller than the sum of its proper divisors (223509020).

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

138121060 is a wasteful number, since it uses less digits than its factorization.

138121060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89716 (or 89714 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 138121060 is about 11752.4916507096. The cubic root of 138121060 is about 516.9159911237.

Adding to 138121060 its reverse (60121831), we get a palindrome (198242891).

The spelling of 138121060 in words is "one hundred thirty-eight million, one hundred twenty-one thousand, sixty".