138541841 has 4 divisors (see below), whose sum is σ = 141155892. Its totient is φ = 135927792.

The previous prime is 138541813. The next prime is 138541849. The reversal of 138541841 is 148145831.

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

It can be written as a sum of positive squares in 2 ways, for example, as 65934400 + 72607441 = 8120^2 + 8521^2 .

It is a cyclic number.

It is not a de Polignac number, because 138541841 - 2¹⁸ = 138279697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138541849) 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, 1306946 + ... + 1307051.

It is an arithmetic number, because the mean of its divisors is an integer number (35288973).

Almost surely, 2^138541841 is an apocalyptic number.

It is an amenable number.

138541841 is a deficient number, since it is larger than the sum of its proper divisors (2614051).

138541841 is an equidigital number, since it uses as much as digits as its factorization.

138541841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2614050.

The product of its digits is 15360, while the sum is 35.

The square root of 138541841 is about 11770.3798154520. The cubic root of 138541841 is about 517.4403811611.

The spelling of 138541841 in words is "one hundred thirty-eight million, five hundred forty-one thousand, eight hundred forty-one".