128625307 has 8 divisors (see below), whose sum is σ = 135530960. Its totient is φ = 121733280.

The previous prime is 128625257. The next prime is 128625317. The reversal of 128625307 is 703526821.

It is a happy number.

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 128625307 - 2¹¹ = 128623259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128625317) 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, 20257 + ... + 25837.

It is an arithmetic number, because the mean of its divisors is an integer number (16941370).

Almost surely, 2^128625307 is an apocalyptic number.

128625307 is a deficient number, since it is larger than the sum of its proper divisors (6905653).

128625307 is a wasteful number, since it uses less digits than its factorization.

128625307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6813.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 128625307 is about 11341.3097568138. The cubic root of 128625307 is about 504.7877512133.

The spelling of 128625307 in words is "one hundred twenty-eight million, six hundred twenty-five thousand, three hundred seven".