128712715 has 8 divisors (see below), whose sum is σ = 161170848. Its totient is φ = 98493120.

The previous prime is 128712691. The next prime is 128712719. The reversal of 128712715 is 517217821.

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

It is not a de Polignac number, because 128712715 - 2⁷ = 128712587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128712719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 559506 + ... + 559735.

It is an arithmetic number, because the mean of its divisors is an integer number (20146356).

Almost surely, 2^128712715 is an apocalyptic number.

128712715 is a deficient number, since it is larger than the sum of its proper divisors (32458133).

128712715 is a wasteful number, since it uses less digits than its factorization.

128712715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119269.

The product of its digits is 7840, while the sum is 34.

The square root of 128712715 is about 11345.1626255422. The cubic root of 128712715 is about 504.9020690408.

The spelling of 128712715 in words is "one hundred twenty-eight million, seven hundred twelve thousand, seven hundred fifteen".