128546465 has 8 divisors (see below), whose sum is σ = 157166568. Its totient is φ = 100896640.

The previous prime is 128546461. The next prime is 128546489. The reversal of 128546465 is 564645821.

It can be written as a sum of positive squares in 4 ways, for example, as 14569489 + 113976976 = 3817^2 + 10676^2 .

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

It is not a de Polignac number, because 128546465 - 2² = 128546461 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (128546461) 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, 242276 + ... + 242805.

It is an arithmetic number, because the mean of its divisors is an integer number (19645821).

Almost surely, 2^128546465 is an apocalyptic number.

It is an amenable number.

128546465 is a deficient number, since it is larger than the sum of its proper divisors (28620103).

128546465 is an equidigital number, since it uses as much as digits as its factorization.

128546465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485139.

The product of its digits is 230400, while the sum is 41.

The square root of 128546465 is about 11337.8333468084. The cubic root of 128546465 is about 504.6845921197.

The spelling of 128546465 in words is "one hundred twenty-eight million, five hundred forty-six thousand, four hundred sixty-five".