120865 has 8 divisors (see below), whose sum is σ = 151488. Its totient is φ = 92400.

The previous prime is 120863. The next prime is 120871. The reversal of 120865 is 568021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 120865 - 2¹ = 120863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411 + ... + 640.

It is an arithmetic number, because the mean of its divisors is an integer number (18936).

2¹²⁰⁸⁶⁵ is an apocalyptic number.

It is an amenable number.

120865 is a deficient number, since it is larger than the sum of its proper divisors (30623).

120865 is a wasteful number, since it uses less digits than its factorization.

120865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 120865 is about 347.6564396067. The cubic root of 120865 is about 49.4424730472.

Adding to 120865 its reverse (568021), we get a palindrome (688886).

The spelling of 120865 in words is "one hundred twenty thousand, eight hundred sixty-five".