138038145 has 48 divisors (see below), whose sum is σ = 259427520. Its totient is φ = 62487936.

The previous prime is 138038119. The next prime is 138038149. The reversal of 138038145 is 541830831.

It is not a de Polignac number, because 138038145 - 2¹¹ = 138036097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138038149) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 79254 + ... + 80976.

It is an arithmetic number, because the mean of its divisors is an integer number (5404740).

Almost surely, 2^138038145 is an apocalyptic number.

138038145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138038145 is a deficient number, since it is larger than the sum of its proper divisors (121389375).

138038145 is a wasteful number, since it uses less digits than its factorization.

138038145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1854 (or 1847 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 138038145 is about 11748.9635713113. The cubic root of 138038145 is about 516.8125343720.

Adding to 138038145 its reverse (541830831), we get a palindrome (679868976).

The spelling of 138038145 in words is "one hundred thirty-eight million, thirty-eight thousand, one hundred forty-five".