138068242 has 8 divisors (see below), whose sum is σ = 223033356. Its totient is φ = 63723792.

The previous prime is 138068191. The next prime is 138068243. The reversal of 138068242 is 242860831.

It can be written as a sum of positive squares in 2 ways, for example, as 138039001 + 29241 = 11749^2 + 171^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 138068198 and 138068207.

It is not an unprimeable number, because it can be changed into a prime (138068243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2655133 + ... + 2655184.

Almost surely, 2^138068242 is an apocalyptic number.

138068242 is a deficient number, since it is larger than the sum of its proper divisors (84965114).

138068242 is a wasteful number, since it uses less digits than its factorization.

138068242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5310332.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 138068242 is about 11750.2443378851. The cubic root of 138068242 is about 516.8500925327.

The spelling of 138068242 in words is "one hundred thirty-eight million, sixty-eight thousand, two hundred forty-two".