42289 has 4 divisors (see below), whose sum is σ = 45556. Its totient is φ = 39024.

The previous prime is 42283. The next prime is 42293. The reversal of 42289 is 98224.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27889 + 14400 = 167^2 + 120^2 .

It is a cyclic number.

It is not a de Polignac number, because 42289 - 2³ = 42281 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (42281) 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 3 ways as a sum of consecutive naturals, for example, 1614 + ... + 1639.

It is an arithmetic number, because the mean of its divisors is an integer number (11389).

2⁴²²⁸⁹ is an apocalyptic number.

It is an amenable number.

42289 is a deficient number, since it is larger than the sum of its proper divisors (3267).

42289 is a wasteful number, since it uses less digits than its factorization.

42289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3266.

The product of its digits is 1152, while the sum is 25.

The square root of 42289 is about 205.6428943582. The cubic root of 42289 is about 34.8398121895.

The spelling of 42289 in words is "forty-two thousand, two hundred eighty-nine".