138574015 has 4 divisors (see below), whose sum is σ = 166288824. Its totient is φ = 110859208.

The previous prime is 138573997. The next prime is 138574031. The reversal of 138574015 is 510475831.

It is a happy number.

138574015 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 510475831 = 19 ⋅26867149.

It is a cyclic number.

It is not a de Polignac number, because 138574015 - 2⁵ = 138573983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13857397 + ... + 13857406.

It is an arithmetic number, because the mean of its divisors is an integer number (41572206).

Almost surely, 2^138574015 is an apocalyptic number.

138574015 is a deficient number, since it is larger than the sum of its proper divisors (27714809).

138574015 is an equidigital number, since it uses as much as digits as its factorization.

138574015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27714808.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 138574015 is about 11771.7464719556. The cubic root of 138574015 is about 517.4804336539.

The spelling of 138574015 in words is "one hundred thirty-eight million, five hundred seventy-four thousand, fifteen".