138302542 has 16 divisors (see below), whose sum is σ = 247398912. Its totient is φ = 56695320.

The previous prime is 138302477. The next prime is 138302569. The reversal of 138302542 is 245203831.

It is a self number, because there is not a number n which added to its sum of digits gives 138302542.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 214434 + ... + 215077.

It is an arithmetic number, because the mean of its divisors is an integer number (15462432).

Almost surely, 2^138302542 is an apocalyptic number.

138302542 is a deficient number, since it is larger than the sum of its proper divisors (109096370).

138302542 is a wasteful number, since it uses less digits than its factorization.

138302542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429543.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 138302542 is about 11760.2101171705. The cubic root of 138302542 is about 517.1422899245.

The spelling of 138302542 in words is "one hundred thirty-eight million, three hundred two thousand, five hundred forty-two".