128241937 has 4 divisors (see below), whose sum is σ = 128698596. Its totient is φ = 127785280.

The previous prime is 128241929. The next prime is 128241941. The reversal of 128241937 is 739142821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30647296 + 97594641 = 5536^2 + 9879^2 .

It is a cyclic number.

It is not a de Polignac number, because 128241937 - 2³ = 128241929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128241896 and 128241905.

It is not an unprimeable number, because it can be changed into a prime (128241907) 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, 227908 + ... + 228469.

It is an arithmetic number, because the mean of its divisors is an integer number (32174649).

Almost surely, 2^128241937 is an apocalyptic number.

It is an amenable number.

128241937 is a deficient number, since it is larger than the sum of its proper divisors (456659).

128241937 is an equidigital number, since it uses as much as digits as its factorization.

128241937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456658.

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

The square root of 128241937 is about 11324.3956571642. The cubic root of 128241937 is about 504.2857425303.

The spelling of 128241937 in words is "one hundred twenty-eight million, two hundred forty-one thousand, nine hundred thirty-seven".