128421053 has 2 divisors, whose sum is σ = 128421054. Its totient is φ = 128421052.

The previous prime is 128421031. The next prime is 128421071. The reversal of 128421053 is 350124821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111471364 + 16949689 = 10558^2 + 4117^2 .

It is a cyclic number.

It is not a de Polignac number, because 128421053 - 2⁶ = 128420989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128421023) 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 as a sum of consecutive naturals, namely, 64210526 + 64210527.

It is an arithmetic number, because the mean of its divisors is an integer number (64210527).

Almost surely, 2^128421053 is an apocalyptic number.

It is an amenable number.

128421053 is a deficient number, since it is larger than the sum of its proper divisors (1).

128421053 is an equidigital number, since it uses as much as digits as its factorization.

128421053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 128421053 is about 11332.3013108547. The cubic root of 128421053 is about 504.5204125793.

Adding to 128421053 its reverse (350124821), we get a palindrome (478545874).

The spelling of 128421053 in words is "one hundred twenty-eight million, four hundred twenty-one thousand, fifty-three".