128916265 has 8 divisors (see below), whose sum is σ = 161425728. Its totient is φ = 98648880.

The previous prime is 128916247. The next prime is 128916283. The reversal of 128916265 is 562619821.

It is an interprime number because it is at equal distance from previous prime (128916247) and next prime (128916283).

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

It is not a de Polignac number, because 128916265 - 2¹¹ = 128914217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 560391 + ... + 560620.

It is an arithmetic number, because the mean of its divisors is an integer number (20178216).

Almost surely, 2^128916265 is an apocalyptic number.

It is an amenable number.

128916265 is a deficient number, since it is larger than the sum of its proper divisors (32509463).

128916265 is a wasteful number, since it uses less digits than its factorization.

128916265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121039.

The product of its digits is 51840, while the sum is 40.

The square root of 128916265 is about 11354.1298653838. The cubic root of 128916265 is about 505.1680844269.

The spelling of 128916265 in words is "one hundred twenty-eight million, nine hundred sixteen thousand, two hundred sixty-five".