138769042 has 8 divisors (see below), whose sum is σ = 208240956. Its totient is φ = 69355392.

The previous prime is 138769039. The next prime is 138769069. The reversal of 138769042 is 240967831.

It can be written as a sum of positive squares in 2 ways, for example, as 136212241 + 2556801 = 11671^2 + 1599^2 .

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 = 138768986 and 138769004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8023 + ... + 18490.

Almost surely, 2^138769042 is an apocalyptic number.

138769042 is a deficient number, since it is larger than the sum of its proper divisors (69471914).

138769042 is a wasteful number, since it uses less digits than its factorization.

138769042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29132.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 138769042 is about 11780.0272495440. The cubic root of 138769042 is about 517.7230846007.

The spelling of 138769042 in words is "one hundred thirty-eight million, seven hundred sixty-nine thousand, forty-two".