120989 has 8 divisors (see below), whose sum is σ = 139968. Its totient is φ = 103360.

The previous prime is 120977. The next prime is 120997. The reversal of 120989 is 989021.

120989 is nontrivially palindromic in base 4.

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

It is a de Polignac number, because none of the positive numbers 2^k-120989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137 + ... + 510.

It is an arithmetic number, because the mean of its divisors is an integer number (17496).

2¹²⁰⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

120989 is a deficient number, since it is larger than the sum of its proper divisors (18979).

120989 is a wasteful number, since it uses less digits than its factorization.

120989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 120989 is about 347.8347308709. The cubic root of 120989 is about 49.4593755727.

The spelling of 120989 in words is "one hundred twenty thousand, nine hundred eighty-nine".