120755565 has 48 divisors (see below), whose sum is σ = 247478400. Its totient is φ = 53294976.

The previous prime is 120755563. The next prime is 120755597. The reversal of 120755565 is 565557021.

It is a happy number.

120755565 is a `hidden beast` number, since 1 + 20 + 75 + 5 + 565 = 666.

It is not a de Polignac number, because 120755565 - 2¹ = 120755563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120755561) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2526 + ... + 15744.

It is an arithmetic number, because the mean of its divisors is an integer number (5155800).

Almost surely, 2^120755565 is an apocalyptic number.

120755565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

120755565 is an abundant number, since it is smaller than the sum of its proper divisors (126722835).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

120755565 is a wasteful number, since it uses less digits than its factorization.

120755565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13266 (or 13263 counting only the distinct ones).

The product of its (nonzero) digits is 52500, while the sum is 36.

The square root of 120755565 is about 10988.8837012683. The cubic root of 120755565 is about 494.2754628078.

The spelling of 120755565 in words is "one hundred twenty million, seven hundred fifty-five thousand, five hundred sixty-five".