128715641 has 8 divisors (see below), whose sum is σ = 134196480. Its totient is φ = 123347952.

The previous prime is 128715611. The next prime is 128715647. The reversal of 128715641 is 146517821.

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

It is a cyclic number.

It is not a de Polignac number, because 128715641 - 2¹⁸ = 128453497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (128715647) 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, 25961 + ... + 30518.

It is an arithmetic number, because the mean of its divisors is an integer number (16774560).

Almost surely, 2^128715641 is an apocalyptic number.

It is an amenable number.

128715641 is a deficient number, since it is larger than the sum of its proper divisors (5480839).

128715641 is an equidigital number, since it uses as much as digits as its factorization.

128715641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56575.

The product of its digits is 13440, while the sum is 35.

The square root of 128715641 is about 11345.2915784479. The cubic root of 128715641 is about 504.9058949572.

The spelling of 128715641 in words is "one hundred twenty-eight million, seven hundred fifteen thousand, six hundred forty-one".