128355745 has 16 divisors (see below), whose sum is σ = 179625600. Its totient is φ = 88014192.

The previous prime is 128355737. The next prime is 128355751. The reversal of 128355745 is 547553821.

It is not a de Polignac number, because 128355745 - 2³ = 128355737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128355698 and 128355707.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35707 + ... + 39136.

It is an arithmetic number, because the mean of its divisors is an integer number (11226600).

Almost surely, 2^128355745 is an apocalyptic number.

It is an amenable number.

128355745 is a deficient number, since it is larger than the sum of its proper divisors (51269855).

128355745 is an frugal number, since it uses more digits than its factorization.

128355745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74869 (or 74855 counting only the distinct ones).

The product of its digits is 168000, while the sum is 40.

The square root of 128355745 is about 11329.4194467325. The cubic root of 128355745 is about 504.4348741485.

The spelling of 128355745 in words is "one hundred twenty-eight million, three hundred fifty-five thousand, seven hundred forty-five".