128168745 has 16 divisors (see below), whose sum is σ = 205485120. Its totient is φ = 68218304.

The previous prime is 128168743. The next prime is 128168749. The reversal of 128168745 is 547861821.

It is a cyclic number.

It is not a de Polignac number, because 128168745 - 2¹ = 128168743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128168697 and 128168706.

It is not an unprimeable number, because it can be changed into a prime (128168741) 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, 759 + ... + 16028.

It is an arithmetic number, because the mean of its divisors is an integer number (12842820).

Almost surely, 2^128168745 is an apocalyptic number.

128168745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128168745 is a deficient number, since it is larger than the sum of its proper divisors (77316375).

128168745 is a wasteful number, since it uses less digits than its factorization.

128168745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17304.

The product of its digits is 107520, while the sum is 42.

The square root of 128168745 is about 11321.1635886070. The cubic root of 128168745 is about 504.1897866440.

The spelling of 128168745 in words is "one hundred twenty-eight million, one hundred sixty-eight thousand, seven hundred forty-five".