138045715 has 4 divisors (see below), whose sum is σ = 165654864. Its totient is φ = 110436568.

The previous prime is 138045709. The next prime is 138045727. The reversal of 138045715 is 517540831.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138045715 - 2⁷ = 138045587 is a prime.

It is a super-2 number, since 2×138045715² = 38113238859722450, which contains 22 as substring.

It is a Duffinian 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, 13804567 + ... + 13804576.

It is an arithmetic number, because the mean of its divisors is an integer number (41413716).

Almost surely, 2^138045715 is an apocalyptic number.

138045715 is a deficient number, since it is larger than the sum of its proper divisors (27609149).

138045715 is an equidigital number, since it uses as much as digits as its factorization.

138045715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27609148.

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

The square root of 138045715 is about 11749.2857229706. The cubic root of 138045715 is about 516.8219815176.

The spelling of 138045715 in words is "one hundred thirty-eight million, forty-five thousand, seven hundred fifteen".