128345851 has 12 divisors (see below), whose sum is σ = 134329104. Its totient is φ = 122612000.

The previous prime is 128345843. The next prime is 128345863. The reversal of 128345851 is 158543821.

It is not a de Polignac number, because 128345851 - 2³ = 128345843 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128345851.

It is not an unprimeable number, because it can be changed into a prime (128345821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84186 + ... + 85696.

It is an arithmetic number, because the mean of its divisors is an integer number (11194092).

Almost surely, 2^128345851 is an apocalyptic number.

128345851 is a deficient number, since it is larger than the sum of its proper divisors (5983253).

128345851 is a wasteful number, since it uses less digits than its factorization.

128345851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1670 (or 1641 counting only the distinct ones).

The product of its digits is 38400, while the sum is 37.

The square root of 128345851 is about 11328.9827875233. The cubic root of 128345851 is about 504.4219127577.

The spelling of 128345851 in words is "one hundred twenty-eight million, three hundred forty-five thousand, eight hundred fifty-one".