128650741 has 4 divisors (see below), whose sum is σ = 128695084. Its totient is φ = 128606400.

The previous prime is 128650721. The next prime is 128650759. The reversal of 128650741 is 147056821.

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 6105841 + 122544900 = 2471^2 + 11070^2 .

It is a cyclic number.

It is not a de Polignac number, because 128650741 - 2⁹ = 128650229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128650697 and 128650706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128650721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17490 + ... + 23731.

It is an arithmetic number, because the mean of its divisors is an integer number (32173771).

Almost surely, 2^128650741 is an apocalyptic number.

It is an amenable number.

128650741 is a deficient number, since it is larger than the sum of its proper divisors (44343).

128650741 is an equidigital number, since it uses as much as digits as its factorization.

128650741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44342.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 128650741 is about 11342.4310004514. The cubic root of 128650741 is about 504.8210207821.

The spelling of 128650741 in words is "one hundred twenty-eight million, six hundred fifty thousand, seven hundred forty-one".