128040045 has 32 divisors (see below), whose sum is σ = 234635520. Its totient is φ = 58406400.

The previous prime is 128040041. The next prime is 128040047. The reversal of 128040045 is 540040821.

It is not a de Polignac number, because 128040045 - 2² = 128040041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128039997 and 128040024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128040041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62091 + ... + 64119.

It is an arithmetic number, because the mean of its divisors is an integer number (7332360).

Almost surely, 2^128040045 is an apocalyptic number.

128040045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128040045 is a deficient number, since it is larger than the sum of its proper divisors (106595475).

128040045 is a wasteful number, since it uses less digits than its factorization.

128040045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2645.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 128040045 is about 11315.4781162795. The cubic root of 128040045 is about 504.0209702474.

Adding to 128040045 its reverse (540040821), we get a palindrome (668080866).

The spelling of 128040045 in words is "one hundred twenty-eight million, forty thousand, forty-five".