138757015 has 8 divisors (see below), whose sum is σ = 166895568. Its totient is φ = 110747520.

The previous prime is 138757007. The next prime is 138757039. The reversal of 138757015 is 510757831.

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

It is not a de Polignac number, because 138757015 - 2³ = 138757007 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 7 ways as a sum of consecutive naturals, for example, 29881 + ... + 34210.

It is an arithmetic number, because the mean of its divisors is an integer number (20861946).

Almost surely, 2^138757015 is an apocalyptic number.

138757015 is a deficient number, since it is larger than the sum of its proper divisors (28138553).

138757015 is an equidigital number, since it uses as much as digits as its factorization.

138757015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64529.

The product of its (nonzero) digits is 29400, while the sum is 37.

The square root of 138757015 is about 11779.5167557927. The cubic root of 138757015 is about 517.7081272890.

The spelling of 138757015 in words is "one hundred thirty-eight million, seven hundred fifty-seven thousand, fifteen".