138025061 has 4 divisors (see below), whose sum is σ = 138108000. Its totient is φ = 137942124.

The previous prime is 138025049. The next prime is 138025073. The reversal of 138025061 is 160520831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 160520831 = 3343 ⋅48017.

It is an interprime number because it is at equal distance from previous prime (138025049) and next prime (138025073).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138025061 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 138025061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138027061) 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, 38921 + ... + 42318.

It is an arithmetic number, because the mean of its divisors is an integer number (34527000).

Almost surely, 2^138025061 is an apocalyptic number.

It is an amenable number.

138025061 is a deficient number, since it is larger than the sum of its proper divisors (82939).

138025061 is an equidigital number, since it uses as much as digits as its factorization.

138025061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82938.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 138025061 is about 11748.4067430439. The cubic root of 138025061 is about 516.7962050961.

Adding to 138025061 its reverse (160520831), we get a palindrome (298545892).

The spelling of 138025061 in words is "one hundred thirty-eight million, twenty-five thousand, sixty-one".