128389541 has 4 divisors (see below), whose sum is σ = 146730912. Its totient is φ = 110048172.

The previous prime is 128389511. The next prime is 128389577. The reversal of 128389541 is 145983821.

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.

It is a cyclic number.

It is not a de Polignac number, because 128389541 - 2¹⁰ = 128388517 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 (128389511) 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, 9170675 + ... + 9170688.

It is an arithmetic number, because the mean of its divisors is an integer number (36682728).

Almost surely, 2^128389541 is an apocalyptic number.

It is an amenable number.

128389541 is a deficient number, since it is larger than the sum of its proper divisors (18341371).

128389541 is an equidigital number, since it uses as much as digits as its factorization.

128389541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18341370.

The product of its digits is 69120, while the sum is 41.

The square root of 128389541 is about 11330.9108636508. The cubic root of 128389541 is about 504.4791427422.

The spelling of 128389541 in words is "one hundred twenty-eight million, three hundred eighty-nine thousand, five hundred forty-one".