42489 has 6 divisors (see below), whose sum is σ = 61386. Its totient is φ = 28320.

The previous prime is 42487. The next prime is 42491. The reversal of 42489 is 98424.

It is an interprime number because it is at equal distance from previous prime (42487) and next prime (42491).

It can be written as a sum of positive squares in only one way, i.e., 36864 + 5625 = 192^2 + 75^2 .

It is not a de Polignac number, because 42489 - 2¹ = 42487 is a prime.

It is a super-4 number, since 4×42489⁴ = 13036650744444978564, which contains 4444 as substring.

It is a Curzon number.

It is a plaindrome in base 14.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 42489.

It is not an unprimeable number, because it can be changed into a prime (42487) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2352 + ... + 2369.

It is an arithmetic number, because the mean of its divisors is an integer number (10231).

2⁴²⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

42489 is a deficient number, since it is larger than the sum of its proper divisors (18897).

42489 is a wasteful number, since it uses less digits than its factorization.

42489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4727 (or 4724 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 42489 is about 206.1286006356. The cubic root of 42489 is about 34.8946491962.

The spelling of 42489 in words is "forty-two thousand, four hundred eighty-nine".