138421127 has 4 divisors (see below), whose sum is σ = 149068920. Its totient is φ = 127773336.

The previous prime is 138421117. The next prime is 138421141. The reversal of 138421127 is 721124831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138421127 - 2¹⁴ = 138404743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138421127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138421117) 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, 5323877 + ... + 5323902.

It is an arithmetic number, because the mean of its divisors is an integer number (37267230).

Almost surely, 2^138421127 is an apocalyptic number.

138421127 is a deficient number, since it is larger than the sum of its proper divisors (10647793).

138421127 is a wasteful number, since it uses less digits than its factorization.

138421127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10647792.

The product of its digits is 2688, while the sum is 29.

The square root of 138421127 is about 11765.2508260555. The cubic root of 138421127 is about 517.2900524517.

Adding to 138421127 its reverse (721124831), we get a palindrome (859545958).

The spelling of 138421127 in words is "one hundred thirty-eight million, four hundred twenty-one thousand, one hundred twenty-seven".