128650481 has 2 divisors, whose sum is σ = 128650482. Its totient is φ = 128650480.

The previous prime is 128650471. The next prime is 128650493. The reversal of 128650481 is 184056821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123565456 + 5085025 = 11116^2 + 2255^2 .

It is a cyclic number.

It is not a de Polignac number, because 128650481 - 2²² = 124456177 is a prime.

It is a super-2 number, since 2×128650481² = 33101892523062722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128650471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64325240 + 64325241.

It is an arithmetic number, because the mean of its divisors is an integer number (64325241).

Almost surely, 2^128650481 is an apocalyptic number.

It is an amenable number.

128650481 is a deficient number, since it is larger than the sum of its proper divisors (1).

128650481 is an equidigital number, since it uses as much as digits as its factorization.

128650481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 128650481 is about 11342.4195390578. The cubic root of 128650481 is about 504.8206807049.

The spelling of 128650481 in words is "one hundred twenty-eight million, six hundred fifty thousand, four hundred eighty-one".