138624241 has 8 divisors (see below), whose sum is σ = 158518784. Its totient is φ = 118752480.

The previous prime is 138624229. The next prime is 138624251. The reversal of 138624241 is 142426831.

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

It is not a de Polignac number, because 138624241 - 2⁷ = 138624113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138624251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10381 + ... + 19621.

It is an arithmetic number, because the mean of its divisors is an integer number (19814848).

Almost surely, 2^138624241 is an apocalyptic number.

It is an amenable number.

138624241 is a deficient number, since it is larger than the sum of its proper divisors (19894543).

138624241 is an equidigital number, since it uses as much as digits as its factorization.

138624241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11391.

The product of its digits is 9216, while the sum is 31.

The square root of 138624241 is about 11773.8796069945. The cubic root of 138624241 is about 517.5429461741.

The spelling of 138624241 in words is "one hundred thirty-eight million, six hundred twenty-four thousand, two hundred forty-one".