128264761 has 16 divisors (see below), whose sum is σ = 134009280. Its totient is φ = 122690880.

The previous prime is 128264729. The next prime is 128264771. The reversal of 128264761 is 167462821.

It is a cyclic number.

It is not a de Polignac number, because 128264761 - 2⁵ = 128264729 is a prime.

It is a Duffinian number.

Its product of digits (32256) is a multiple of the sum of its prime divisors (504).

It is a self number, because there is not a number n which added to its sum of digits gives 128264761.

It is not an unprimeable number, because it can be changed into a prime (128264771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 564930 + ... + 565156.

It is an arithmetic number, because the mean of its divisors is an integer number (8375580).

Almost surely, 2^128264761 is an apocalyptic number.

It is an amenable number.

128264761 is a deficient number, since it is larger than the sum of its proper divisors (5744519).

128264761 is a wasteful number, since it uses less digits than its factorization.

128264761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504.

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

The square root of 128264761 is about 11325.4033482256. The cubic root of 128264761 is about 504.3156576924.

The spelling of 128264761 in words is "one hundred twenty-eight million, two hundred sixty-four thousand, seven hundred sixty-one".