138766042 has 8 divisors (see below), whose sum is σ = 209788416. Its totient is φ = 68836572.

The previous prime is 138766039. The next prime is 138766051. The reversal of 138766042 is 240667831.

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 = 138765992 and 138766010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272908 + ... + 273415.

It is an arithmetic number, because the mean of its divisors is an integer number (26223552).

Almost surely, 2^138766042 is an apocalyptic number.

138766042 is a deficient number, since it is larger than the sum of its proper divisors (71022374).

138766042 is a wasteful number, since it uses less digits than its factorization.

138766042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546452.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 138766042 is about 11779.8999146852. The cubic root of 138766042 is about 517.7193537483.

The spelling of 138766042 in words is "one hundred thirty-eight million, seven hundred sixty-six thousand, forty-two".