128455237 has 2 divisors, whose sum is σ = 128455238. Its totient is φ = 128455236.

The previous prime is 128455211. The next prime is 128455241. The reversal of 128455237 is 732554821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123676641 + 4778596 = 11121^2 + 2186^2 .

It is an emirp because it is prime and its reverse (732554821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128455237 - 2¹¹ = 128453189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128455196 and 128455205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128455267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64227618 + 64227619.

It is an arithmetic number, because the mean of its divisors is an integer number (64227619).

Almost surely, 2^128455237 is an apocalyptic number.

It is an amenable number.

128455237 is a deficient number, since it is larger than the sum of its proper divisors (1).

128455237 is an equidigital number, since it uses as much as digits as its factorization.

128455237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67200, while the sum is 37.

The square root of 128455237 is about 11333.8094654886. The cubic root of 128455237 is about 504.5651741801.

The spelling of 128455237 in words is "one hundred twenty-eight million, four hundred fifty-five thousand, two hundred thirty-seven".