128397241 has 8 divisors (see below), whose sum is σ = 147129920. Its totient is φ = 109762128.

The previous prime is 128397233. The next prime is 128397331. The reversal of 128397241 is 142793821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128397241 - 2³ = 128397233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128397241.

It is not an unprimeable number, because it can be changed into a prime (128397211) 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, 21546 + ... + 26851.

It is an arithmetic number, because the mean of its divisors is an integer number (18391240).

Almost surely, 2^128397241 is an apocalyptic number.

It is an amenable number.

128397241 is a deficient number, since it is larger than the sum of its proper divisors (18732679).

128397241 is an equidigital number, since it uses as much as digits as its factorization.

128397241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48783.

The product of its digits is 24192, while the sum is 37.

The square root of 128397241 is about 11331.2506370656. The cubic root of 128397241 is about 504.4892277063.

The spelling of 128397241 in words is "one hundred twenty-eight million, three hundred ninety-seven thousand, two hundred forty-one".