128416507 has 4 divisors (see below), whose sum is σ = 128440440. Its totient is φ = 128392576.

The previous prime is 128416489. The next prime is 128416511. The reversal of 128416507 is 705614821.

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 128416507 - 2¹¹ = 128414459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128416517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219 + ... + 16027.

It is an arithmetic number, because the mean of its divisors is an integer number (32110110).

Almost surely, 2^128416507 is an apocalyptic number.

128416507 is a deficient number, since it is larger than the sum of its proper divisors (23933).

128416507 is an equidigital number, since it uses as much as digits as its factorization.

128416507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23932.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 128416507 is about 11332.1007319914. The cubic root of 128416507 is about 504.5144593060.

The spelling of 128416507 in words is "one hundred twenty-eight million, four hundred sixteen thousand, five hundred seven".