128265077 has 2 divisors, whose sum is σ = 128265078. Its totient is φ = 128265076.

The previous prime is 128265061. The next prime is 128265079. The reversal of 128265077 is 770562821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73119601 + 55145476 = 8551^2 + 7426^2 .

It is a cyclic number.

It is not a de Polignac number, because 128265077 - 2⁴ = 128265061 is a prime.

Together with 128265079, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128265077.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128265079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64132538 + 64132539.

It is an arithmetic number, because the mean of its divisors is an integer number (64132539).

Almost surely, 2^128265077 is an apocalyptic number.

It is an amenable number.

128265077 is a deficient number, since it is larger than the sum of its proper divisors (1).

128265077 is an equidigital number, since it uses as much as digits as its factorization.

128265077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 128265077 is about 11325.4172991550. The cubic root of 128265077 is about 504.3160718452.

The spelling of 128265077 in words is "one hundred twenty-eight million, two hundred sixty-five thousand, seventy-seven".