128466217 has 8 divisors (see below), whose sum is σ = 140438592. Its totient is φ = 116542800.

The previous prime is 128466211. The next prime is 128466227. The reversal of 128466217 is 712664821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128466217 - 2³ = 128466209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128466211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6634 + ... + 17347.

It is an arithmetic number, because the mean of its divisors is an integer number (17554824).

Almost surely, 2^128466217 is an apocalyptic number.

It is an amenable number.

128466217 is a deficient number, since it is larger than the sum of its proper divisors (11972375).

128466217 is a wasteful number, since it uses less digits than its factorization.

128466217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24479.

The product of its digits is 32256, while the sum is 37.

The square root of 128466217 is about 11334.2938465526. The cubic root of 128466217 is about 504.5795500512.

The spelling of 128466217 in words is "one hundred twenty-eight million, four hundred sixty-six thousand, two hundred seventeen".