138671015 has 8 divisors (see below), whose sum is σ = 190177440. Its totient is φ = 95088672.

The previous prime is 138671003. The next prime is 138671051. The reversal of 138671015 is 510176831.

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

It is a de Polignac number, because none of the positive numbers 2^k-138671015 is a prime.

It is a super-2 number, since 2×138671015² = 38459300802260450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1980980 + ... + 1981049.

It is an arithmetic number, because the mean of its divisors is an integer number (23772180).

Almost surely, 2^138671015 is an apocalyptic number.

138671015 is a deficient number, since it is larger than the sum of its proper divisors (51506425).

138671015 is an equidigital number, since it uses as much as digits as its factorization.

138671015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3962041.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 138671015 is about 11775.8657855803. The cubic root of 138671015 is about 517.6011486728.

The spelling of 138671015 in words is "one hundred thirty-eight million, six hundred seventy-one thousand, fifteen".