120128605 has 16 divisors (see below), whose sum is σ = 146389680. Its totient is φ = 94624768.

The previous prime is 120128599. The next prime is 120128633. The reversal of 120128605 is 506821021.

It can be written as a sum of positive squares in 8 ways, for example, as 3790809 + 116337796 = 1947^2 + 10786^2 .

It is a cyclic number.

It is not a de Polignac number, because 120128605 - 2³ = 120128597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120128605.

It is a congruent number.

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, 97131 + ... + 98359.

It is an arithmetic number, because the mean of its divisors is an integer number (9149355).

Almost surely, 2^120128605 is an apocalyptic number.

It is an amenable number.

120128605 is a deficient number, since it is larger than the sum of its proper divisors (26261075).

120128605 is a wasteful number, since it uses less digits than its factorization.

120128605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 120128605 is about 10960.3195665090. The cubic root of 120128605 is about 493.4185559592.

Adding to 120128605 its reverse (506821021), we get a palindrome (626949626).

The spelling of 120128605 in words is "one hundred twenty million, one hundred twenty-eight thousand, six hundred five".