128477 has 2 divisors, whose sum is σ = 128478. Its totient is φ = 128476.

The previous prime is 128473. The next prime is 128483. The reversal of 128477 is 774821.

128477 is nontrivially palindromic in base 11.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106276 + 22201 = 326^2 + 149^2 .

It is an emirp because it is prime and its reverse (774821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128477 - 2² = 128473 is a prime.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 128477.

It is not a weakly prime, because it can be changed into another prime (128473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64238 + 64239.

It is an arithmetic number, because the mean of its divisors is an integer number (64239).

2¹²⁸⁴⁷⁷ is an apocalyptic number.

It is an amenable number.

128477 is a deficient number, since it is larger than the sum of its proper divisors (1).

128477 is an equidigital number, since it uses as much as digits as its factorization.

128477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3136, while the sum is 29.

The square root of 128477 is about 358.4368842628. The cubic root of 128477 is about 50.4593667197.

The spelling of 128477 in words is "one hundred twenty-eight thousand, four hundred seventy-seven".