128425164 has 24 divisors (see below), whose sum is σ = 342467328. Its totient is φ = 36692880.

The previous prime is 128425151. The next prime is 128425181. The reversal of 128425164 is 461524821.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 764352 + ... + 764519.

It is an arithmetic number, because the mean of its divisors is an integer number (14269472).

Almost surely, 2^128425164 is an apocalyptic number.

128425164 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

128425164 is an abundant number, since it is smaller than the sum of its proper divisors (214042164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128425164 is a wasteful number, since it uses less digits than its factorization.

128425164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1528885 (or 1528883 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

The square root of 128425164 is about 11332.4826935672. The cubic root of 128425164 is about 504.5257960717.

Adding to 128425164 its reverse (461524821), we get a palindrome (589949985).

The spelling of 128425164 in words is "one hundred twenty-eight million, four hundred twenty-five thousand, one hundred sixty-four".