67128045 has 16 divisors (see below), whose sum is σ = 113058240. Its totient is φ = 33917184.

The previous prime is 67128023. The next prime is 67128049. The reversal of 67128045 is 54082176.

It is not a de Polignac number, because 67128045 - 2⁸ = 67127789 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 67127997 and 67128015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67128049) 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, 117484 + ... + 118053.

It is an arithmetic number, because the mean of its divisors is an integer number (7066140).

Almost surely, 2^67128045 is an apocalyptic number.

It is an amenable number.

67128045 is a deficient number, since it is larger than the sum of its proper divisors (45930195).

67128045 is a wasteful number, since it uses less digits than its factorization.

67128045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235564.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 67128045 is about 8193.1706316908. The cubic root of 67128045 is about 406.4133821731.

The spelling of 67128045 in words is "sixty-seven million, one hundred twenty-eight thousand, forty-five".