128425207 has 4 divisors (see below), whose sum is σ = 128660536. Its totient is φ = 128189880.

The previous prime is 128425189. The next prime is 128425211. The reversal of 128425207 is 702524821.

It is a happy number.

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 128425207 - 2¹¹ = 128423159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128425607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116844 + ... + 117937.

It is an arithmetic number, because the mean of its divisors is an integer number (32165134).

Almost surely, 2^128425207 is an apocalyptic number.

128425207 is a deficient number, since it is larger than the sum of its proper divisors (235329).

128425207 is an equidigital number, since it uses as much as digits as its factorization.

128425207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235328.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 128425207 is about 11332.4845907683. The cubic root of 128425207 is about 504.5258523810.

The spelling of 128425207 in words is "one hundred twenty-eight million, four hundred twenty-five thousand, two hundred seven".