128901481 has 2 divisors, whose sum is σ = 128901482. Its totient is φ = 128901480.

The previous prime is 128901449. The next prime is 128901523. The reversal of 128901481 is 184109821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84345856 + 44555625 = 9184^2 + 6675^2 .

It is a cyclic number.

It is not a de Polignac number, because 128901481 - 2⁵ = 128901449 is a prime.

It is a super-2 number, since 2×128901481² = 33231183607986722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128991481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64450740 + 64450741.

It is an arithmetic number, because the mean of its divisors is an integer number (64450741).

Almost surely, 2^128901481 is an apocalyptic number.

It is an amenable number.

128901481 is a deficient number, since it is larger than the sum of its proper divisors (1).

128901481 is an equidigital number, since it uses as much as digits as its factorization.

128901481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 34.

The square root of 128901481 is about 11353.4788060753. The cubic root of 128901481 is about 505.1487729499.

The spelling of 128901481 in words is "one hundred twenty-eight million, nine hundred one thousand, four hundred eighty-one".