138195041 has 4 divisors (see below), whose sum is σ = 138222084. Its totient is φ = 138168000.

The previous prime is 138195019. The next prime is 138195047. The reversal of 138195041 is 140591831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 140591831 = 3529 ⋅39839.

It can be written as a sum of positive squares in 2 ways, for example, as 35760400 + 102434641 = 5980^2 + 10121^2 .

It is a cyclic number.

It is not a de Polignac number, because 138195041 - 2⁶ = 138194977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138194989 and 138195007.

It is not an unprimeable number, because it can be changed into a prime (138195047) 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 3 ways as a sum of consecutive naturals, for example, 3260 + ... + 16941.

It is an arithmetic number, because the mean of its divisors is an integer number (34555521).

Almost surely, 2^138195041 is an apocalyptic number.

It is an amenable number.

138195041 is a deficient number, since it is larger than the sum of its proper divisors (27043).

138195041 is an equidigital number, since it uses as much as digits as its factorization.

138195041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27042.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 138195041 is about 11755.6386895821. The cubic root of 138195041 is about 517.0082655778.

The spelling of 138195041 in words is "one hundred thirty-eight million, one hundred ninety-five thousand, forty-one".