138145061 has 8 divisors (see below), whose sum is σ = 144270720. Its totient is φ = 132029392.

The previous prime is 138145027. The next prime is 138145069. The reversal of 138145061 is 160541831.

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 138145061 - 2⁶ = 138144997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138145069) 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, 46136 + ... + 49038.

It is an arithmetic number, because the mean of its divisors is an integer number (18033840).

Almost surely, 2^138145061 is an apocalyptic number.

It is an amenable number.

138145061 is a deficient number, since it is larger than the sum of its proper divisors (6125659).

138145061 is a wasteful number, since it uses less digits than its factorization.

138145061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4995.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 138145061 is about 11753.5127089734. The cubic root of 138145061 is about 516.9459305169.

Adding to 138145061 its reverse (160541831), we get a palindrome (298686892).

The spelling of 138145061 in words is "one hundred thirty-eight million, one hundred forty-five thousand, sixty-one".