138511841 has 8 divisors (see below), whose sum is σ = 151268544. Its totient is φ = 126055440.

The previous prime is 138511823. The next prime is 138511861. The reversal of 138511841 is 148115831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138511841 - 2⁶ = 138511777 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 138511798 and 138511807.

It is not an unprimeable number, because it can be changed into a prime (138511861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74111 + ... + 75956.

It is an arithmetic number, because the mean of its divisors is an integer number (18908568).

Almost surely, 2^138511841 is an apocalyptic number.

It is an amenable number.

138511841 is a deficient number, since it is larger than the sum of its proper divisors (12756703).

138511841 is a wasteful number, since it uses less digits than its factorization.

138511841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150151.

The product of its digits is 3840, while the sum is 32.

The square root of 138511841 is about 11769.1053610714. The cubic root of 138511841 is about 517.4030294318.

The spelling of 138511841 in words is "one hundred thirty-eight million, five hundred eleven thousand, eight hundred forty-one".