128604945 has 16 divisors (see below), whose sum is σ = 235163520. Its totient is φ = 58790784.

The previous prime is 128604943. The next prime is 128604967. The reversal of 128604945 is 549406821.

It is not a de Polignac number, because 128604945 - 2¹ = 128604943 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (128604941) 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, 612300 + ... + 612509.

It is an arithmetic number, because the mean of its divisors is an integer number (14697720).

Almost surely, 2^128604945 is an apocalyptic number.

128604945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128604945 is a deficient number, since it is larger than the sum of its proper divisors (106558575).

128604945 is a wasteful number, since it uses less digits than its factorization.

128604945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224824.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 128604945 is about 11340.4120295517. The cubic root of 128604945 is about 504.7611130375.

The spelling of 128604945 in words is "one hundred twenty-eight million, six hundred four thousand, nine hundred forty-five".