128162417 has 6 divisors (see below), whose sum is σ = 133977522. Its totient is φ = 122589632.

The previous prime is 128162399. The next prime is 128162443. The reversal of 128162417 is 714261821.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 71250481 + 56911936 = 8441^2 + 7544^2 .

It is not a de Polignac number, because 128162417 - 2⁸ = 128162161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128162497) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 120608 + ... + 121665.

It is an arithmetic number, because the mean of its divisors is an integer number (22329587).

Almost surely, 2^128162417 is an apocalyptic number.

It is an amenable number.

128162417 is a deficient number, since it is larger than the sum of its proper divisors (5815105).

128162417 is an equidigital number, since it uses as much as digits as its factorization.

128162417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242319 (or 242296 counting only the distinct ones).

The product of its digits is 5376, while the sum is 32.

The square root of 128162417 is about 11320.8841085845. The cubic root of 128162417 is about 504.1814888189.

The spelling of 128162417 in words is "one hundred twenty-eight million, one hundred sixty-two thousand, four hundred seventeen".