42389 has 8 divisors (see below), whose sum is σ = 47040. Its totient is φ = 38016.

The previous prime is 42379. The next prime is 42391. The reversal of 42389 is 98324.

42389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 42389 - 2⁴ = 42373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42349) 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, 389 + ... + 485.

It is an arithmetic number, because the mean of its divisors is an integer number (5880).

2⁴²³⁸⁹ is an apocalyptic number.

It is an amenable number.

42389 is a deficient number, since it is larger than the sum of its proper divisors (4651).

42389 is a wasteful number, since it uses less digits than its factorization.

42389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139.

The product of its digits is 1728, while the sum is 26.

The square root of 42389 is about 205.8858907259. The cubic root of 42389 is about 34.8672522539.

It can be divided in two parts, 423 and 89, that added together give a 9-th power (512 = 2⁹).

The spelling of 42389 in words is "forty-two thousand, three hundred eighty-nine".