128348641 has 4 divisors (see below), whose sum is σ = 129198784. Its totient is φ = 127498500.

The previous prime is 128348639. The next prime is 128348651. The reversal of 128348641 is 146843821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 146843821 = 149 ⋅985529.

It is a cyclic number.

It is not a de Polignac number, because 128348641 - 2¹ = 128348639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128348641.

It is not an unprimeable number, because it can be changed into a prime (128348651) 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, 424845 + ... + 425146.

It is an arithmetic number, because the mean of its divisors is an integer number (32299696).

Almost surely, 2^128348641 is an apocalyptic number.

It is an amenable number.

128348641 is a deficient number, since it is larger than the sum of its proper divisors (850143).

128348641 is an equidigital number, since it uses as much as digits as its factorization.

128348641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850142.

The product of its digits is 36864, while the sum is 37.

The square root of 128348641 is about 11329.1059223577. The cubic root of 128348641 is about 504.4255677959.

The spelling of 128348641 in words is "one hundred twenty-eight million, three hundred forty-eight thousand, six hundred forty-one".