138811124 has 18 divisors (see below), whose sum is σ = 249672150. Its totient is φ = 67527072.

The previous prime is 138811111. The next prime is 138811147. The reversal of 138811124 is 421118831.

It can be written as a sum of positive squares in 3 ways, for example, as 69388900 + 69422224 = 8330^2 + 8332^2 .

It is a super-2 number, since 2×138811124² = 38537056292286752, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7199 + ... + 18150.

It is an arithmetic number, because the mean of its divisors is an integer number (13870675).

Almost surely, 2^138811124 is an apocalyptic number.

It is an amenable number.

138811124 is a deficient number, since it is larger than the sum of its proper divisors (110861026).

138811124 is a wasteful number, since it uses less digits than its factorization.

138811124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25427 (or 25388 counting only the distinct ones).

The product of its digits is 1536, while the sum is 29.

The square root of 138811124 is about 11781.8132730068. The cubic root of 138811124 is about 517.7754128448.

Adding to 138811124 its reverse (421118831), we get a palindrome (559929955).

The spelling of 138811124 in words is "one hundred thirty-eight million, eight hundred eleven thousand, one hundred twenty-four".