120685565 has 32 divisors (see below), whose sum is σ = 194455296. Its totient is φ = 69442560.

The previous prime is 120685541. The next prime is 120685583. The reversal of 120685565 is 565586021.

It is not a de Polignac number, because 120685565 - 2⁸ = 120685309 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7052 + ... + 17061.

It is an arithmetic number, because the mean of its divisors is an integer number (6076728).

Almost surely, 2^120685565 is an apocalyptic number.

It is an amenable number.

120685565 is a deficient number, since it is larger than the sum of its proper divisors (73769731).

120685565 is a wasteful number, since it uses less digits than its factorization.

120685565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24149.

The product of its (nonzero) digits is 72000, while the sum is 38.

The square root of 120685565 is about 10985.6982026633. The cubic root of 120685565 is about 494.1799365820.

The spelling of 120685565 in words is "one hundred twenty million, six hundred eighty-five thousand, five hundred sixty-five".