128455049 has 2 divisors, whose sum is σ = 128455050. Its totient is φ = 128455048.

The previous prime is 128455003. The next prime is 128455051. The reversal of 128455049 is 940554821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65934400 + 62520649 = 8120^2 + 7907^2 .

It is a cyclic number.

It is not a de Polignac number, because 128455049 - 2²⁴ = 111677833 is a prime.

It is a super-2 number, since 2×128455049² = 33001399227184802, which contains 22 as substring.

Together with 128455051, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_7295339 and since 128455049 and 7295339 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (128475049) 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, 64227524 + 64227525.

It is an arithmetic number, because the mean of its divisors is an integer number (64227525).

Almost surely, 2^128455049 is an apocalyptic number.

It is an amenable number.

128455049 is a deficient number, since it is larger than the sum of its proper divisors (1).

128455049 is an equidigital number, since it uses as much as digits as its factorization.

128455049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 128455049 is about 11333.8011717164. The cubic root of 128455049 is about 504.5649280288.

The spelling of 128455049 in words is "one hundred twenty-eight million, four hundred fifty-five thousand, forty-nine".