120785565 has 32 divisors (see below), whose sum is σ = 204433920. Its totient is φ = 60727104.

The previous prime is 120785563. The next prime is 120785617. The reversal of 120785565 is 565587021.

It is not a de Polignac number, because 120785565 - 2¹ = 120785563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120785563) 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, 63762 + ... + 65628.

It is an arithmetic number, because the mean of its divisors is an integer number (6388560).

Almost surely, 2^120785565 is an apocalyptic number.

120785565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

120785565 is a deficient number, since it is larger than the sum of its proper divisors (83648355).

120785565 is a wasteful number, since it uses less digits than its factorization.

120785565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121.

The product of its (nonzero) digits is 84000, while the sum is 39.

The square root of 120785565 is about 10990.2486323104. The cubic root of 120785565 is about 494.3163913179.

The spelling of 120785565 in words is "one hundred twenty million, seven hundred eighty-five thousand, five hundred sixty-five".